TL;DR
Tier Scrolling for everything upgradable in the upgrade planner or with logical progression.What?
Like for the quality scrolling with "Alt" i would suggest Tier Scrolling "Shift+Alt" or something like that for Machines with different levels.For Example
- Assembling Machine 1 + 2 + 3
- Belt Tiers (Yellow + Red + Blue + Green)
- All Inserters
- Module Tiers in one category (Speed, Productivity, Efficiency and Quality separate)
- Small Electric Pole + Medium Electric Pole + Large Electric Pole + Substation
- Burning Mining Drill + Electric Mining Drill + Large Mining Drill
- Maybe something like chests including Logistic Chests
- Maybe Combinators in a order
- Pipes + Pump + Tank
- Train Stop + Rail Signals
Why?
This makes it easier to change items, which belong together without opening the inventory and search for a specific Item.I think this improves the gameplay and makes it easier to build something. Escpecially the Inserter changing and Belt ties would help I think.