Sparking! ZERO | Super Counters are Mashable Ramble
I rambled more than I'd like, but the just of it is Super Counters shouldn't be mashable and one of the higher priority of things that should be addressed.
You should have a cooldown after a failed attempt, and attempting again within that time resets the cooldown.
They still require tight timing, but mashing makes it so you're almost guaranteed to get one sooner or later when this wasn't possible in BT3.
Additionally, the Z-Counter vanishes should cost 1 full block of ki to BT3 levels. Back and forth battles are fun until it becomes the majority of a match. Super Counters can be used to get back the ki advantage, and raising the ki cost will force attempts sooner.