He has been playing better - but gets criticized because he isn't "JJ WATT!" any longer. He is still talented, not quite as physically able any longer. He is now a guy that can get 8-12 sacks a year if he isn't THE defense, would need there to be another, potentially bigger threat (at least) on the line where Watt isn't the focus, who else for the Texans scares you on the opposing offense?
I know, I know, you're thinking but they aren't doubling Watt - well they don't always have to, the guy gets held like crazy but because he is Watt the officials don't call it, and doubling a guy isn't all you can do - quick passes (all too easy against our soft coverage - I like to call it the bend then break defense), have the QB roll slightly to the opposite side, run away from him etc. etc. etc.
Watt would be having a better year, this year, with DJ Reader on the team - obviously my opinion and no way I could prove it - but who can disagree that our line is Watt and a bunch of guys you say "who?" about when they say their name?