I think Hughton has been spot on with this and has been dignified throughout. He doesn't need to say anything and for all we know the letter to the FA could have been his idea.
If his injury is no more than we already know then he'll be back as good as ever once he gets over the mental scars. I don't think anybody will rush him back as it's not worth it and we haven't rushed players back here since Souness left the club. Owen rushed back so that he could play for his beloved England but that wasn't the fault of the club.
A few players were hand slapping him, including Milner. I watched a clip on Youtube last night and saw it again, if you find it keep watching in the background. I saw it at the time and couldn't believe what I was watching.
Hughton interview after the match, I think that's as close as he'll get to being angry.
http://www.skysports.com/video/inline/0,26691,16497_6425309,00.html