Probably already said it earlier in the thread, but Quan is 100000% where he should be right now. Every variation serves its purposes and functions well as an upper mid character right now imo. Yes you have to make some more educated reads than you used to, but that's fighting games so let's not complain about that.
One tool that I don't see anybody mention (which gets me tons of mileage) is his ridiculous backdash. If someone's running at you, backdash can avoid some of the better run in advancing mids in the game and allows you to whiff punish. Yes it's a read, as always, but it's a tool that complements some of his less "one size fits all" neutral buttons to make it all work together nicely.