Oh, wait, I suggest artificer armor is somehow a form of power armor and that's obvious crazy talk, who-hell-would-wonder-that, but it's ok to wonder if FMC's are MCs? They're different unit type entries and everything.
I'm kidding, except I'm kinda not.
More importantly I don't actually see how it would work if Flying Monstrous Creatures were allowed, I mean, how could anyone else engage them? They'd be able to shoot other people, who mostly wouldn't be able to shoot them back, and you can't charge them at all, at least until you get lucky and they fall. They'd completely be able to pick their battles.