Vettel is all brute force scare them out of the way and it does not work on the top level guys as it might have worked when he was back at Torro Rosso or the junior formula but it doesn't work at the top level.
He is faster than shit off a shovel but he does not use his brain as much as the other guys and i don't think anyone can dispute that , that said if he actually learns from his **** ups he will be a weapon on the track.
Personally i think its a management problem , dont stroke his ego and make him feel better when he has a brain fart kick arse like the old days , or slot another driver in for a week..