Sure JO didn't play a lot of games this year but you can't deny the fact that he had a strong impact when he played so saying he is cooked isn't true and if he is healthy for the playoffs (big "if" I know) I think he will surprise a lot of people and make them reassess their opinion of JO.
Of course if you expect him to give you 25 points and 15 rebounds a night you can say he is cooked but in the minutes he played this season he was excellent as a defender, shot blocker and respectable offensively so I will gladly take this production back for 10 or 15 minutes per game in the playoffs, which will be huge.