The new upgrade lines are very welcome. Two suggestions though: (well, really the same for both:)
-Allow auto-refuel to be toggled, in case someone wants to let some cells run themselves out fully before demolishing a structure.
-Allow tick rate upgrades to be turned off, in case someone wants to try something dependent on manual cooling/energy selling.
This would be a very cool game, but there is absolutely no skill involved. It's all luck- if the game doesn't give you the tiles you need, there's nothing you can do.