Well, not no time... You can only dock so many ships per hangar, meaning that while yes you could slap a Boat Bay or two and use that, it would end up taking a serious toll on your mouse, not to mention your sanity to issue so many orders AND micro manage the launch / landing processes to allow it to happen in just one increment.
You could build massive carriers w/ the replenishment gear, but that would defeat the purpose. So... yeah. I think we should have gear similar to Cargo Handling Systems, except it affects small ship launch rate. And have launch rate be a thing. Battlestars had plenty of fighters, but only a few launch tubes, meaning that they could sortie every last one simultaneously... if I recall correctly. Battletech ships also needed time to recover their small ships and had a launch rate tied to Bay Doors.
We have time for ordinance, MSP and fuel... I think it is about time we also get some more hangar/carrier love...
Different types of hangar, docking and launch bays so both parasite size and numbers matters for launching, docking and maintaining parasites. I know Steve have been a bit reluctant adding more complexity to parasites but I don't think it has to be more complex and problematic to handle than ordinance, fuel or MSP exchange will be.
You then also would have to install ordnance and refuelling system in carrier so rearming and refuelling take time depending on the systems you have installed. You would the see differences between a fleet carrier configuration and one just carrying some scouts or survey vessels. A fleet carrier would need allot more internal/external space for servicing/launching military operations while carriers with more simple hangar system can be more streamlined and less complex and cheaper.
As smaller ships in general have become more potent I think that it is about time carriers and especially military fleet carriers become a bit more expensive. I also think that parasites perhaps also should have a small MSP cost to maintain as well. I know the hangars themselves needs maintained so the cost should not be big but it could be at least some small cost as the cost of fighters will rise quite rapidly with technology advancement.
You also could differentiate civilian and military hangars more with different system. Perhaps civilian hangar can install larger launch bays far easier and cheaper while they can't fit internal ordinance systems but have to rely on maintenance facilities to do that.
Anyway... I would enjoy more complexity in parasite management in the future as long as the tools are there to manage them properly which I think we will get in C# Aurora.