So hopefully this would be fairly simple to implement but would be great is, to be able to see power usage and production percentage as a sort of overlay by pressing like alt etc.
So as an example, I press alt and the powerlines show some floating text of current usage / capacity and the constructers and smelters show current usage (or no power if unpowered) alongside production level.
This would make it much easier to see, at a glance, if something isn't powered, is under producing etc.
Maybe also show % full on storage etc. This could make a nice settings menu addition as well, allowing us to only show those under 100% or with no power