Lol, i should rename the topic because we're all mainly talking about the sath here.
Where would it be stored? I doubt the Collosus is 6km long just to be a big arse blowy up thing. Whilst I'm sure I remember a Fenris being 350m long, We have to consider the height issue, as well as the potential downfall it would bring upon the integrity of the destroyer. If it were to have a crusier bay, this would have an effect on its ability to carry enough fighters and bombers to effectively pull off missions. If the Collosus were to come under attack, I'd rather have 2 wings of fighters ready to be deployed, than a Leviathan or even a Deimos.
The same applies to attack missions, whilst a Corvette would have the firepower to seriously hurt anything that the destroyer came across, it's not that hard for capital ships to hit a slowish moving big target such as a corvette. Whereas, a couple of bomber wings if correctly piloted, will be able to avoid beams and enemy fighters to be able to destroy their target.
In the heat of battle when you could dispense cruisers, fighters, and bombers. You'll probably be dispensing only fighters and bombers since they can be deployed faster. Cruisers would be a lot slower to deploy, hence they'd probably be deployed ahead of time when necessary, or if there was time to deploy, or if it's even necessary to deploy.
In other words i don't mean at all deploying cruisers in the same fashion and purpose as fighters and bombers. Since cruisers are a different kind of combat ship compared to fighters and bombers, all of these ships will deployed for their specific purposes and roles (different kinds of ships are different kinds of ships, you were thinking differently though). If a cruiser got deployed, it's sure as hell not going to do a bombing raid, but will be something like providing support for bigger ships.
Instead we'll do away with cruisers, corvettes, destroyers, and juggies since bombers can do everything and every other combat ship has no purpose. But, this leaves behind tiny cargo ships that definitely will fit inside of juggs, and we should deploy those for bombing raids.