The point of shield is that it can have enourmous capacity or couple of hundred thousands and regenerate almost immediately to a full charge. But when you get up, you have to wait for this to happen. This is called a "balance" and this is one of very little amount of places where it actually is in this game.

I don't know what makes you think that this is "balance" whatsoever.
The problem with not being revived with full force shield is that the solo play revive function is useless in a lot of cases because you don't get any breathing room after being revived and and might even die to a ground effect immediately after getting up or just dying again because the lag in this game makes so that you might get hit by enemies you cant even see on your screen because you spammed your whole willpower pool to blink to safety or not get your leech/regen in at all

TL;DR either give force shield builds some amount >0 of shield upon revive or a few seconds of invulnerability