You have to remember, Starmade is first and foremost a sandbox game, you can't punish those two pilots with an unwinnable situation because that's how they choose to build their ships. Everybody will build different ships so the game should be best balanced for every situation possible and not for some idealized build style.Erm... If two pilots go into combat with ten thousand shield blocks and only 500 weapon blocks... They're nuts. Just absolutely nuts.
And yeah, on a more serious note, I wouldn't mind not having in-combat regen for shields. I don't see how that change alone would 'balance' shielding though. I view it only as a minor detail in a larger murder-mystery. My big concern at the moment is that shielding isn't gated by the same things that it's counter is gated by. Weapons have to worry not only about the mass and space they take up, but also about the energy they consume. When pit against each other, shields are only paying for their regen. The (on base minute and a half of damage) capacity is essentially free. Even with in combat regen completely removed, people would still have obscene amounts of shielding simply because they don't have to pay anything for it when it really counts.
If you remove in combat shield recovery you are guaranteed of one thing, the shields will fail, always. The balance then becomes how strong do you make the shields in order to make combat not long and drawn out.
Another thing I don't think anybody has taken into account is stations and fleets. Stations will always be tanks because you cannot put weapons on them so the more shields the merrier, should stations only be capable of being killed by a ship that has as many guns as it has shields? If ships can only be taken out by similarly balanced ships or larger ships than the is no incentive to build smaller specialized ships. Once fleets are added into the game the gigantism problem gets much worse as everybody will just fly around with their titan and 5 wing-titans.
Once again I'll also say I am not opposed to adding a power consumption to shields as a balancing factor (As long as it's not the only balancing factor). I'll just keep saying that it's a big task to adding a huge power drain to every ship in existence that wasn't there before. Adding this power sink upsets the balance of thrusters, weapons, defencive effects and should not be approached lightly.