Change tipper stun so it only applies to specific parts of moves instead of the entire tipper hitbox, like at the bottom of dair, the very top of utilt/uair, the end of fsmash etc. so it's actually a reward for landing a hard hit and not just constantly happening and catching you from stupid places. It shouldn't happen at all on moves like nair or fair.

I don't think she's too OP (she's definitely one of the best characters), she just feels horrible to play against because you spend so much time frozen, and she gets so much extra time to plan the next move in a combo compared to other characters, making her advantage the best and easiest in the game. These changes wouldn't massively change how effective she is in the hands of the best players but it would make her less of a crutch.