I think OVAs have an advantage in time available for action scenes. With a TV episode, 20 mins are not enough for a big battle, you just see snippets of action here and there and then the main character scene. With an OVA you can have enough time for the action scene of another character too, as demonstrated by Macross Zero.
I still say in Macross Plus they pulled more extreme stunts though.
Frontier has very good action scenes, they are just short and to the point. If it gets the OVA/Movie option, I think it could top everything we've seen until now.
FV