A control node for controlling energy production, similar to the one for factory production, would be nice. Have it pause mark III generators first, and if you still have excess energy after all mark III's are paused, it will start pausing the Mark II's. If you go to build, or turn on something, and you don't have enough energy, it will bring enough online to do the job, and leave the rest offline.
The reason for that is because right now I find micromanaging my generators to be a pain. Right now in the game I'm playing, I have 79 generators. The Mark I's are always on, as are the two Zenith that I have captured. Most of the Mark II's are paused on a general basis, but sometimes I'll unpause them, like when I want to use my golem. The mark III's are almost never used, except when the Golem plus a bunch of other ships are all in use.
So to unpause the golem, I have to bring up the generator menu, which is sorted alphabetically (almost the most useless way to sort it, paused/unpaused and then subsorting by mark level would be so much nicer), and then start selecting mark II generators and bringing them online. I can't even see half my generators, because the menu only shows the first 30 of them, so I just have to hope that I don't have a mark III online somewhere, or that somewhere in the last 40 are some paused mark II's that I don't want paused.
After the attack, the retreat and pausing of the golem, and the massive loss of ships, I suddenly have over 700,000 net power. Now I have to go through again and pause all those power generators so my economy can be fully used to rebuild ships because I just lost 1500 ships in a couple of minutes in a failed attack on a Mark IV system. So thus, power management is a huge micromanagement thingy, and since the game is supposed to not need it....