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The real trick here, is "What do you want the navy to do?"
That is, "what constitutes a 'Flag officer' on a combat vessel?"
The FedCom, most Clans, etc. use 'mechwarriors or fighter pilots as command officers on deep-space vessels. It isn't hard to rate someone who knows not to open both doors on the airlock while in deep space 'elite' when that's your baseline.
For the most part, (and this is almost, but not quite universal) the viewpoint of Warships is a combination 'Large Transport' that also does orbital bombardments, often placed in the hands of someone who craves 'glory' to the extent they're willing to try to drive that large transport INTO the hull of another ship. (Not just the feddies, the fiction and source materials show this is popular enough to make bad jokes about it.)
So your first 'ask' is 'What is it for? why is this better than another line of dropships?'
Wall-of-battle could certainly benefit from heavier throw weight, but how often are you expecting to fight fleet engagements? How often are you expecting peer or near-peer forces to fight in formation? How often are you expecting to be engaging alone? or only with your parasite (dropship) assets? How good is your fighter doctrine? can you replace the pilots at a rapid rate? can you train pilots fast enough to make up losses?
How fast can you turn out sister ships or escorts? or bigger ships TO escort? this isn't just ships, it's crews as well.
my point is, Navies are strategic assets with tactical elements, but their primary aspect, is that they are instruments of strategy and power projection, and that the Navy you can build and support is worth a thousand Yamatos or Musashi's or Bismarcks, even if it's all corvettes and destroyers.
That is, presuming you're going to devote the resources and time to develop not only your current serving officers, but their replacemenets as well.
that, in turn, goes back to what you are actually intending your navy to do-what role in your national policy you need a Navy for, that you can't get from a transport command and expanded fighter wings.
The basic Fox is a very good combat transport, it fit the desire for an armed chaperone for landing craft that could execute point bombardments and provide covering fire while acting as a planet-scale command post for invasion forces.
IOW it's actually quite 'fit' for that role. Vessels like the Avalon are much more expensive and not quite as fit for that role. (See: FSS Lucien Davion or the entry on Palmyra in sarna.)
It's only 'undergunned' in comparison with ships many times larger that aren't designed to fill the same role, it's only slow compared to ships of its size that are also, not particularly as good at transport.
Keep in mind, you don't want to drag your transported ground troops around at 1.5 or higher gee for long, or you're going to have a passenger bay full of medical patients before they can discharge excess energy into the target you want them discharging it into. High sustained gee doesn't make supermen, it makes patients for long-term medical care.