I'm a bit worried about the ball ditzing Ubers, if I read it right. Although how that is worse than a concussion blast, I'm not sure.
I want timing! It it a second per second in the air? How accurate do you have to be? Is the diagram right, do you have to arc it?
Depending on the stats, I could really like this. I can see our rezident scouts running across the bridge awning in 2.0FORT bonking a sniper with a baseball then just all going to town with him.
Glad the penalty is so severe, as was said before. Doublejump to stun?
Is the bat more, or less effective when you use it for whacking? Is the ball an alt-fire? Does it have ammo? Do you have to retrieve your ball? I would love it if other people could pick up your ball as ammo and suddenly you're ball-less.