Here are my suggestions:
- Given the new Foundry steel recipe with a conversion ratio of 1.33 iron ore to 1 steel, the Youki variant made in the Frank & Peppe Industrial Smelter needs to be rebalanced as it currently has a conversion ratio of 3.88:1 and the production chain has less opportunity to benefit from productivity modules.
- The Youki plastic from unicomp and steel with heat storage block recipes should also benefit from the productivity enhancing technologies for those resources.
- There is the potential of adding foundry variants of the F4 and N7 processing chain using some calcite to make molten F4 and N7 which could then be used to directly produce N4 Pellets, N4, Compressed F4, Charged F-C, Orange Stuff, Reinforced Gear, Durotal Structure Element, Pressure Proof Element, D-Z Wafer, Plated Heat Exchanger, Supra Conductive Coil, Conductive Wire, Bullet Case, N4 Pipes and Green Pipes. Additionally the recipes for Iron Housing, Empty Can, A2 Pipes, Youki belts and YI Mining Drills could also be added to the foundry.
- The Electromagnetic plant would be a good candidate for adding the Electric Structure, B-YI-MCFB, M68K Chip, I286 Chip, Supra Conductive Coil, Conductive Wire, YI-Energy accumulators and solar panels, Youki modules, Youki power poles, Wired Capacitor Component, Weapon Energy Cartridge, E-Motor-Winding and the small medium and large electric MF generators.
- Most of the Youki Liquids recipes and Green Lube for the chemical plant could also be added to the Biochamber and Cyrogenics facility in varying combinations.
- The Biochamber might benefit from there being a recipe to convert Slurry into Nutrients with a low efficiency and to be able to produce the Forage Typ recipes, Trifitan, Organic Compost, Vegetable Oil, Rabio and Industrial Vugar recipes.
- It would be nice if there were Youki alternative recipes to make Jellynut and Yumako. This could potentially be done using a DNA-Splicer with Production Science, Spliced Zells, Nature Signs and either Lubricant or Plastic to make the initial seeds (assuming the player does not just import them) while growing them could be a slow Framed Farm recipe using Organic Compost, Liquid Unicomp, Nutrients, Industrial Vugar and copper or iron ore. Alternatively they could be a Trade Node/Laika Gate recipe in exchange for packages involving PT-ishys, Smoked Ji-Ribu-s or Nature Signs along with the normal Merchant Sign toxicity.
- The variety of canned food trades for the Trade Node/Laika Gate could be expanded to include Metallurgic Science, Agricultural Science, Electromagnetic Science and Cryogenic Science using various unused combinations of Verotin, Chitrotin, Fish, Alien Blood, Ommtrinit, Cooking Meat, Vegetable Oil, Yumako and/or Jellynut products, Bioflux and Biter Eggs. To make the Prometheum Science packs slightly challenging there should be a trade which delivers promethium asteroid chunks which then need to get launched into orbit 10 at a time. Use of Gleba ingredients and Biter Eggs should probably be focused more on the later tier science exchanges.
- 3 tiers of a Youki quality module should be introduced with t1 and t2 having the same costs as the other Youki modules of their respective tier and T3 requiring Organicum Ferrum (not used by most Youki players currently), Transmuted Quantrium and a large number of Merchant Signs or Reputation. Function wise It should either be a highball slightly better than regular quality but no speed penalty in exchange for a heafty energy use penalty (+300%?) or it is a trash tier speed module able to be put in beacons with a minor quality boost but can get to high numbers through stacking.
- Addition of an Organic Compost to Spoilage recipe might be useful for T3 efficiency modules.
- The Cimota Restructor should be able to turn unicomp into Calcite, Tungsten and Holmium ore along with the three unique Aquilo fluids and vice versa. This could be tech locked or progress locked to prevent early access to some bonuses. Also given the relative rarities, the amount of unicomp per ore could be adjusted like uranium so that 1x holmium ore is equivalent to 5 unicomp while tungsten has 4 ore per unicomp to adjust for mining speed.
- Like regular Youki the manufacturing progress should be orthogonal to vanilla progression using minimal vanilla resources for intermediates. That way the early Youki Cimota science packs are an inefficient compromise to progress to Space Science while the long term investment in the YI Agronomie infrastructure allows for more efficient science pack yields than the regular recipes but should not undercut players being able to get to the world in the first place.
- Addition of a lower damage but wider splash/fragmentation area damage rail gun ammo might be beneficial.
- The Youki player equipment power source is now only middle tier with the new Portable Fusion Reactor. Maybe consider a MK2? Maybe require a few Quantrium Reactors and a load of Instable Quantrium in the crafting.
- Update the "New Year" monuments to 2024-2025 or add a newer one?
- Youki filter inserters (S.I. Prototype 41) are obsolete and there is a need for ones with the new belt stacking trait.
- Potentially add washer recipes to make purified holmium and tungsten along with corresponding recipes to make their plate equivalent products. This could add a small inbuilt productivity bonus and would allow quality holmium ore to progress to quality plate. As an input fluid Sulphuric Acid would be more appropriate than water but with the same contaminated water output.
- There is a potential to add a lower range but higher fire rate YI Railgun. An appropriate name will need to be thought of.
- Although niche there could be a YI lightning rod for Fulgora that uses YI crafting materials and has a larger collection range/efficiency (relative to the lightning collector) but no internal energy storage.
- An alternative Foundation recipe using Durotal or Hardic Walls, Infused Mud and a load of Slag as an ingredient would be convenient.
- The YI belts will need rebalancing. Currently the T1 is an intermediate between red and blue but has longer range undergrounds and the T2 was pretty much what turbo is now. Given the high cost of Special Sheet Metal they probably should be upgraded to a tier above Turbo belts as far as efficiency goes.
- Weapon Energy Cartridge and Plasma Capsule damage needs to be linked into the tech tree (potential bug).
- YI gun turrets need to gain a damage boost from the bullet damage research (potential bug).
- Potentially add a prometheum asteroid chunk to Unicomp SA crusher recipe.
- Add a plasma producing recipe for the Quantrium Reactor.
- Potentially add a YI recycler that has no/reduced losses and an extra module slot but is fuelled by liquid unicomp (non trivial amounts)?
- Potentially add Unicomp pipes for plasma flow or upgrade A2 pipes?
- Potentially add a T4 Youki circuit that uses 100 of all token types as a high end crafting intermediate?
- Add a cargo bay using Youki materials with a slightly larger capacity or smaller footprint.
- Potentially add a YI asteroid harvester with a larger footprint, narrower but longer collection field but has base productivity or can directly pickup medium asteroids for 6 chunks?
- Potentially add Liquid Unicomp and Plasma or Hydroitin consuming thrusters with high thrust for late game?
- There is the opportunity for Tesla ammo variants incorporating Youki intermediates with different damage types, fork chances and splash damage radii.
- Given the Vulcanus theme of near infinite resources there should be a low efficiency Cimota Restructor recipe for converting Lava into Unicomp (joke recipe).
- Maybe add a fuel type compatible with Fusion reactors made in the Fusion Fuel Mixer from MX-C Fusion Fuels, Graphite Containment and Fuel Cell C after a Rheinsburg Reactor/Washer chain?