I love the shield stacking fix/variation, nicely thought out. I have a query however. I believe this affects ALL bubble shields? While I think that is right for Mobile Shield Generators, does this not affect the balance of other bubbles quite significantly, and not in a positive way? The Fatboy, for instance, and also the UEF ACU and sACU. Stopping shield stacking is admirable, but if possible I would exclude those units with extremely high cost shields, as they cannot be stacked, and as they are on higher value targets. I don't think an ACU should be penalised just because it retreated under the base shields to escape death in a Strategic Bomber snipe with increased regeneration time.
If I'm wrong about it affecting mobile Bubbles, just ignore this post