TET I'm going to try do this is your style...devil's advocate if you like....
He hasn't had enough matches with the 1st team so not sure how we can be critical of his passing ability. It tskes seasoned pros time to adapt their style to fit in with the 1st team.
Physically he has bulked up...he's naturally small but are we really still in the mind set that if you're small you can't hack it. Thought fans were past that stereotype. As for mentally mature....no one knows where he is mentally. He gets his chance and he tries to make things happen, IMO. He has very little time to really do anything. He may try to hard and force it a bit but what do you expect. In his mind it may be another 3 months before he gets on the pitch again. I've never seen him pull a Griff and walk onto the park, head down, can't be arsed attitude. Whenever he has had his wee 10 minute chance he's ran about and tried to get on the ball and do something. He wants to prove himself, that's how it looks to me anyway.
What is the issue with his attitude?? Has he come out and said something that's upset the fans. He believes in his abilities and wants to play football. I'd be more concerned if he didn't care about not being selected. Another Feruz who is happy to steal a wage without giving a shit. He appears to be working hard and wanting a chance....ofcourse the SMSM will tell us he wants away ofcourse.
Hes only inexperienced because we have refused to give him a chance. Play him in the cups, against the smaller clubs or in dead rubber matches. He is, or was an obvious talent. If he hasn't or doesn't fulfil his potential then that's on Celtic. It's sad that he's been written off due to bullshit media reports and poor coaching from our club. IMO