Having played for a while, I'd say mantas physics are mostly fine for me. Side effect of more heli style flyer is that it's damn slow (compared to jet), and battles are really not that exciting in current state.
I'd like an afterburner to recharge faster though so I can use f.x. zoom and boom more, or maybe some addon for manta that does it. It would shake it up a bit and make for some different tactics.