Carriers launching drones is hardly a solution for a capital class countering multiple snubs. If they behave like NPCs, and making them behave like anything more than that is going to be considerable work, they will be useless. It's quite easy for snubs just to switch off and deal with the 5 or so drones for 30 seconds or so. If the drones are capable enough to seriously deter snubcraft then you will need to rebalance snubs. I guess what I'm trying to say is that no ship should be able to survive an encounter where he is facing multiple enemies and expect to way away with a shit-eating victory grin (no matter how much it costs) unless he is vastly more skilled. This is precisely why LFs and HFs are rare - VHFs simply dominate them.
Now, if rebalancing is done badly, then yes they will end like destroyers as you claim. Or you know, do it well.