I'd really rather see some weapons, or at least one weapon(the frag cannon) just plain old looked at from a duration standpoint.
The Frag cannon is laughable against shields, and you have to be more or less point blank to make it worthwhile against the hull--it is quite a damaging weapon when employed this way, though. Problem is, combining its high rate of fire with its paltry 30 round clip, it's a weapon that is the very definition of spray and pray with a deployment duration defined by ammo management. In my opinion, ammo supply alone is what keeps this weapon in the outfitting bay and off of many ships.
Cannons and Plasma accelerators sporting a hundred rounds makes them something that has to be monitored, but you generally will be able to get some seat time out of them at least. While it'd be handy to have more, I'm not sure it's entirely necessary. Multi Cannons have enough ammunition to hit a RES zone for well over a half hour, so this seems like a fair trade off for their superior anti-hull capabilities.