I don't know about the coaches at Southampton. They've gotten some good results with other players but Dyer seems to play like a 12-year old at times. Maybe the coaches just didn't get to him, maybe he didn't want to learn because it was all to easy for him in the youth leagues. I really don't know. He just makes a lot of basic mistakes and doesn't seem to know what to do when running at players. Against blackpool he must have ran straight at the defender about 5 times without even trying to pass they guy.
I agree about the impact player, he can really cause damage when the game is stretched.