Haven't done it yet, but it will happen.
I expect it will be very stable whether set up hot or mild. An FBL controller can respond and move very quickly. A flybar head can respond very quickly if set up hot. I don't see why it would have to be sluggish with fast digital servos and plenty of throw.
It will have built in damping from the flybar and the ability to move quickly. I can't see how this can go wrong. Understand, I'm not looking for smack, but it should be able to jump around plenty quick for sport to mild 3-D......maybe more. My hypothetical .02$.
I love the smell of nitro in the morning.