....I agree, his performances for the majority of last season should be applauded. I think the 'thick' tag might be accurate but it is harsh terminology. I don't think Barkley has the self-intellect to manage games and influence others. He needs a mentor type manager to exploit the undoubted talent. I noticed Jagielka taking time out last season to talk to him lots. that's what he needs.
You are right, it is a lazy tag much like the "fat" one banded about but it doesn't mean the essence of it is untrue.
Barkley's strengths are not his footballing intelligence, his fitness can be worked on. In spite of that he still had a better domestic season that pretty much any midfielder other than Mahrez and that is with falling away from March onwards. He plays on instinct and there does come a point with Barkley where you work on a lad strengths not their weaknesses.
Gerrard was one of the most influential players of his age group but I would also say lacked a football brain. Benitez tried to coach his but in the end got the best out of him when he let him be what he was and focussed on improving his strengths (goals, assists from central areas).
Whether that means playing Ross deeper in an 8 so he has players in front of him and can break from deeper, or as a 10 (more in a second striker role) or as almost an attacking wide striker in a 4-3-3 I am not sure. There are arguments for both. However in spite of Collymore's intervention inspire of a lack of a football brain he has still performed better than any other players in that England squad in terms of stats and deserved better.
The Liverpool Echo rightly asked which of that England football team had a football brain. Die doesn't, Alli definitely doesn't and was completely lost, I'm not sure Kane or Sturridge really do either and Vardy was woeful. I was a funny intervention from Collymore, not wrong but just surprising he chose to pick on the lad who didn't play a minute in any of the appalling performances at the Euro's. Smacks me of deflecting the blame.
As a final point, Dowell has a fantastic football brain. When you watch them both they are completely different. He lacks Barkley's power and strength of running as well as his ability to "get stuck in" win headers etc (Barkley can get better at this) but he is a much cleverer player.