[dogscoff]

say red if it can fire, yellow if it can move, orange if it can do both.

Or maybe some other colours completely, since some ppl have troubling distinguishing between those three...

Chromatic nitpick aside... you wouldn't have to have fractional shield regeneration. If the minimum of 1 shield point regenerated per impulse is still too high, just multiply all shield, weapon & damage Ratings up by a common factor (say 10) and then recalculate the number of impulses needed for regenerators.

In other words, the minimum of 10 shield points regeneration per turn wouldn't be a big deal, if a shield generator I produced 500 points and a DUC I did 150 damage.