While this may be an asymmetry issue between gen and cap, in many cases, this just means you need to restart your game because you are desynced. You may also have multiple capacitors built and have a disabled secondary one selected.
Shield capacitors have a maintenance drain they put on your generators; so, if they become to asymmetrical, the drain becomes more than you can regen; so, space mechanic is right about this one.
Nah, they just need to go back to old under-fire mechanics. They were only broken cus ppl kept using docked armor, not because it was a bad baseline system. By using 2 component shielding, it made for different flavors of shields which makes the game more interesting for builders and pilots alike. I would if anything suggest going to 3 component shields by adding Projectors to define your bubble size independent of regen or capacity. I'd also like to see the parts have to be piped together like reactors, instead of the auto detection garbage, but that's just me.