So if the GTVA has no cruisers (other than those kind of crappy Mentu's and those really crappy Fenris cruisers), doesn't that leave something of a hole in their fleet?
That is the hole the corvette class is intended to fill.
a Myrmidon can take down a cruiser more or less by itself, after all.
Assuming that it isn't armed with a Maxim (which I doubt is standard issue), an Aeolus can shred a wing of Myrmidons.
Trebuchets. It would seem common sense that, if you do drop capships for that type of engagement, you'd adopt that type of weapon as standard.
Or, of course, Helios bombs.
(NB: worth probably noting, that it'd be quite difficult for a cruiser to defend any sort of large or stretched out convoy because it's a big, slow and unwieldy ship and can't really dart about and cover blind spots in the same way as a simple wing of fighters can.
While I agree with the whole fighter protection/escort thing we cant ignore the fact that at some point you may need some aditional protection or firepower and the only cruiser that is eficient wnough would be the Aeoli...!
At some point. May. Note those qualifiers.
I doubt, somehow, there are the same number of cruisers are convoys. And if you're talking about a reserve capship ready to jump in....well, that applies to bomber wings or corvettes.
Oh and i dont really think that the GTVA will discard of its cruisers t least not for a while. Perhaps they could even design new classes of cruisers who knows. I'm just sayng that the cruisers have proved they value over and over agin across theyr long history and they are very usefull even now.
And corvettes are simply a better class and specification of ship. We've seen the Fenris completely outclassed by fighters, and the Aeolus is canonically considered a failure, plus the Aten and Mentu are rubbish, so....well, you do the math.