My personal thoughts on the launch bay are a sort of short-range boarding action, or a single squadron of fighters/fighterbombers either for escort duties or to explain to the other guys that they're not messing about. It was originally designed to be an in-system ship.
The fwd bay hardpoint is about 300m x 100m x 100m (possibly larger for torpedoes, as it's measured from the bay doors). At least if I've done my math right! That should be big enough for a small number of small craft. Perhaps something like the Space Marine boarding craft? Apparently that's small compared to a boarding torpedo, so it should fit if torps do. In short, it's not a warship.
That said...
Someone suggested a Hunter replacement, so I'm considering the torpedoes. An insert, or a whole prow replacement might be on the cards... Either way, the shape won't change much, so I'll do it once the rest of the ship is complete, so I don't have to maintain two near-identical ships. I'll hold off on any further detailing of that interior section until then.
Any thoughts on my turret sprue idea? The smaller ball turrets should - should - be large enough to handle and glue. They should come out about 0.8mm across, which on second though actually looks preeeetty tiny.