Artem: which group of players is the cap supposed to limit growing? When it was first implemented, everyone was around 15 GCL ish, so it did make a huge difference in our ability to get new room. Now, the top group is at GCL 30+, and it takes 300+ million energy for a new room. With or without the cap, I think the difference is minimal.
I don't like the idea of having only one room being able to use energy for upgrading GCL. There are pretty much only two sources of meaningful energy dump in the game: controller upgrade and power mining. For certain rooms, power mining is not an option. What do we do with energy in those rooms?