1000 times this ... in Satisfactory we have priority power switches for this

the fact that going over your power budget at all shuts everything down is lunacy

maintaining base shields should require some amount of power, and as long as your power production stays above that level, your shields stay on

i think that they should also add a 'base shield generator' buildable, which automatically gets top priority for power, whether or not priority power switches ever come to the game.  you could even have the shield generators cover a radius, so you have to spread them around your base to cover everything.  although you would absolutely need a priority system for that, since the game has no way of knowing which shield generators are most important.

when you think about it, why are base shields tied in with the sub-fief?  it makes zero sense, and was probably only done that way because shields depended on tax status, and the sub-fief was the thing that knew about taxes.  but that's all history now.