About PFs... weakening their hull anymore would be going to far IMO. I have seen plasma S torps take out my PFs just about every time if at close range.
I assumed that the one time my PFL survived a hit from a close range R (took 34 internals on it) that the only reason it didn't pop immediately was because it took the shot head on. As in the weapons took some of the damage from going to the engines. Not sure if PFs work this way, but I have seen it work with ships. Just put your phasers within the same arcs as the damage you are taking, and they will take some of the hits instead of it all going to your engines.
I actually do think slowing damaged PFs down would be a good idea... couldn't you just tweak their movement cost a little? Isn't it at .10 right now? Would need some very fine tuning as they need to charge going fast speeds, but once they start taking damage then they'll be feeling it... Is that feasible?
And I'm with 762 and Bear... Would you like to be the small guy in a frig or light cruiser that pops on to play an hour once every day or three, and be forced to lose your ship in a completely hopeless match against a BCH? That ship would be a heavy loss to someone like that with very low PP to fall back on. If ships are going to be worth VCs again, then forcing people to play unfair matches is even more absurd.