That's for the dynamax user, makes it slightly better but doesn't fix shit.They have also made subs dissapear when you dynamax. Both of these lower the 50/50 matchups(which you kept mentioning) alot.
The larger issue with dynamax isn't the abusers, it's the stale gameplay and 50/50s. Having a 19 move metagame is boring and overcentralizing to simply the best stated pokemon. Status moves are barely relevant, and when they are - like in the case of Corsola-G - they counterplay is limitted by the mechanic itself and creates more 50/50s with Dynamax providing offensive capabilities to them with Taunt not even being a reliable check. GMax Alcremie is problematic, but that's not the reason Dynamax should be banned - even if the bug gets fixed the mechanic itself is still at fault.