But keep in mind that the Overlord carries six ASF bays on the sidelines, as much again as a Leopard CV.
Yeah, because as a battalion-level BattleMech transport, it's an extremely valuable strategic asset that needs its own air cover, whether it's the Third Succession War or the Clan Invasion. Yes, I could see potentially cramming LAMs into those bays, especially as LAMs increasingly become more rare and, therefore, another strategic asset you'd like to concentrate in one place, but I can't see one used solely as a LAM carrier unlike, say, the Hamilcar, which probably got stolen often enough by the Word of Blake for that role, but that came to late for everyone else.
A Behemoth not only features a whopping 20 small craft bays, and the cargo space to keep 20 fighters or combat small craft fuelled, armed, and generally combat ready.
Yeah, this strikes me as more attention than you want paid to your Behemoth, though, especially since it's a rare bulk transport DropShip, somewhat fragile, and prohibitively expensive. I could easily see using a LAM or two to supplement defenses and do double duty moving cargo around or even aiding external repairs like a flight-capable WorkMech, but it strikes me as a bad idea as either a static defense or raiding platform.
Quetzalcoatls, meanwhile, don't appear to be purpose-built much, if at all. They mainly seem to come from Scout-class DropShips that have had their docking collars break down instead. While they're still JumpShips and, therefore, have some value, they've lost a great deal of their utility as transport JumpShips, and are probably considered more expendable than a Behemoth. No doubt they're somewhat limited in where they can go, thanks to low acceleration and limited fuel bunkerage, but they can engage in the occasional pirate point assault, and probably work well as a jump point picket or commerce raider.