(impossible. What makes this such a no-brainer, is that the algorithm is 100% one choice solution)
And one of the issues we have with the current situation (and would simply become more evident with, not caused by, automating this) is that it's basically an obvious-choice solution to build tons of backup energy reactors and keep the ones you don't need in low power mode. There's a small upfront resource cost to build them, but it's really quite minor past a certain point in the game.
Where possible, we try to avoid obvious-choice solutions in favor of "if xyz is the case I want to do abc, otherwise def" or further conditional situations. Right now there is some small tradeoff and some circumstances (snake maps, other easily-chokepointed maps) where building the redundant power grid is just simply unnecessary... but other than that it's very straightforward and by far the major component of the decision is "do I, in real-world-time terms, want to deal with the hassle of building and managing all those reactors?", which is also something we want to avoid.
Sure, just making it automated would be more consistent, but it wouldn't solve that underlying problem, and would only make it more plain-as-day and negative to the experiences of a wider base of players.
What I'm thinking is that if reactors couldn't be put in low-power-mode or still cost 1/2 of the resources to maintain even in low-power-mode, there'd be more of an actual decision (and then we could have auto-management, I think). But the problem there is that it just shifts the management problem from "turn them on/off" to "scrap-them/rebuild-them" because destroyed reactors don't cost anything
So then we could get into various disincentives to destroying reactors or crash-building them, like a minimum-construction-time so you absolutely positively cannot get a new reactor online in less than 60 seconds or something like that, or an AIP cost for losing a reactor (oh boy, I bet _that_ would be popular), and so on...
In the end, my personal feeling is that the current set of non-ideal-circumstances is the least non-ideal
But perhaps there are better ways of making those decisions more meaningful.
If the reactors were automatic, I'd say the next step would be just to remove them altogether.
Yea, that's been my feeling too; just make energy generation only come from command stations or something like that so it's a straight-up function of territorial control. That would be simpler, but I don't think it would be more fun.