Another thought, there's no point in singling players out today. Everybody had a bad game. It's impossible for every player to turn bad overnight so the only possible explanation is the system has changed and it's not working.
It's difficult to find any positives at all today. It's like watching a different team to last season.
I don't know if Hughton has deliberately changed the formation but the biggest problem for me was Norwood who played far too deep today. Because he was so deep it was leaving Kayal isolated...