TL;DRDefense economy of Factorio needs better balance. It is a flaw in the otherwise very well balanced game.
What ?I suggest that the amount of bullets in a magazine is increased to 32 and that the flamethrower turret consumption is increased to 50/s
Why ?Building a efficient defense in Factorio is very easy if you know what you are doing, but for beginners it can be frustrating because if you choose the wrong strategy it leads to you spending more and more resources on defense and it is hard to progress.
The problem i see it is the economy between different defensive strategies. Here is an example on what infrastructure you need to have to keep three turrets firing constantly. Given mid game tech level. red/green/military/blue science available, but not yellow/purple
3 Gun turrets:
108 iron miners
60 copper miners
59 steam engines
3 Laser turrets:
8 steam engines
1 pump jack
To me it feels wrong that gun turrets require 8x the power as laser turrets do. The infrastructure required to feed gun turrets with ammo dwarfs all other kind of defense. I still do believe that players should be encouraged to move to better kinds of defenses, but the gap between using gun turrets and flame turrets is just to large.
Flame turrets is available early, requires a totally insignificant amount of fuel and has way better single target dps in addition to aoe damage. This makes defense very trivial from early in the game, if you use them.