so what I am thinking is mozu are sort of a stealth interceptor/fast attack thing depending on loadout
Super Kawarime are more or less workhorse air superiority fighters
would variable frames be like mechanized infantry who get to the battle fast and fight dismounted?
so that would give a combined arms doctrine of something like
Mozu come in low fast and hot, out of orbit and over the horizon to do hits on air defenses, sensors, command and control
Super Kawarime establish no fly
Big Bois come in fast and hit the ground running, do what needs done on the ground? Are like giant pa infantry for assaulting capships?
The variables are the same tier and general specs as the fighters. A little more flexible, because they can land and do humanoid stuff, but they fill similar roles.
The Banshee is fast attack, with a couple of big guns and its wing drones. It's a strike fighter; it can shoot above its weight class with its default loadout of 4 T9's. It can take a recon package that slows it down a bit, but greatly enhances its sensor range.
The Sparrowhawk is more in the space superiority category. Zip in, unload missiles, then hound stuff in humanoid or fighter form depending on what's needed. Classic Robotech stuff.
Both are capable of groundside ops, though I think the Sparrowhawk is better suited for it.
So to go with what you're looking at..
Mozu - Stealth interceptor/fast attack
Super Kawarime / Sparrowhawk - Air Superiority
Banshee - Strike fighter