We have 3 tiers.
T1 speed 1, power 50
T2 speed 1.5, power 100
T3 speed 2, power 250
The problem: Early on power costs resources, which adds a higher price/product tags to T2+ and by default T1 assembler is the most efficient. As real estate is free, using T2 assembler doesn't make sense. Doubly so with the duplicator mod - you just select a 8-assembler line and copy it.
Situation changes a bit once you unlock solar panels (why do they open up before more efficient fuel opens up?) as suddenly power isn't as much a constraint. T1 assemblers are still more efficient but you now can be lazy and upgrade an assembler if you don't want to expand a line. At least that's how I used T2 assemblers. I don't remember using T3 assemblers for anything but robot parts.
More advanced assemblers are slightly more space efficient (in a game where space does not matter) yet they are less efficient overall despite being 'advanced' and it just doesn't make sense.
Please consider ways to fix this disparity. Suggestions:
- Perhaps make T3 assemblers link storage automatically in some fashion with some limits? Like making a 2x2 or 2x3 'large assembler' or stuck a couple vertically. While this doesn't make assemblers themselves more efficient it permits massively reducing footprint. Sheer convenience of that should outweighs the cost in power which at that point only costs some effort to place
- Make T3 assemblers accept air or water as a coolant for further boost to production speed.
P.S. Factorio assemblers also consume more power at higher tiers, but they compensate with 1. slots. 2. pollution. Late game it's the early assembler that are less efficient. But there are niches for T1. If you have a receipt that is rarely needed, receipt can't take productivity modules and assembler idles most of the time, a T1 assembles, which uses less 'idle' power can be a proffered option.