Ignoring the fact that Overdrive is awful and SE shouldn't even start a sentence pertaining to new 2hrs without considering changing it....
What do we want? I've heard talk of x3 Maneuver effects (personally, what Overdrive should include...), dual puppets, more personal control over the auto (like, access to JAs that control magic use, WSs, etc.)...
I'd personally love something, ANYTHING, that didn't only prove useful during G5 fight. Amirite?
So. I'll pose the question again:
What do we want?