I hope these changes are true but they offset it with some better back walk speed/normals. Would main quan immediately. Always loved quan chi but thought his offence was too cheap and his footsies were too limited.
B2 should be plus on hit, slightly faster on startup, and safe on block (-5 ish) at the very least. At mid range it feels like Quan has no options other than commit to a jump or go in for his metered 50/50s. I want to play some footsies!
Safe on block b2 wouldn't be OP in my opinion because to doesn't lead to much unless you commit to an unsafe special cancel. Faster startup would be fine too because it's already unreactable. The only impact is improving its use as a footsie tool, which quan needs after these nerfs to his offence.