Update!
so aparently, b324~upbat connects and jails only certain hit boxes, others it whiffs. never fear tho, because straight bat seems to jail just fine, and works against even small hitbox characters like kitana. since the string is easy to hitconfirm just do upbat when you see it hit and straight bat when you've confirmed a block.

Upbat still works fine for b2~rune, upbat
update 2!
so it would seem you can still connect the upbat on characters like kitana, just the window is pretty small, better off just doing straight bat anyway
