Has zero on the ball intelligence. He, for me, is what we used to call a hit and hope player. Percentages if you will.
Also, imo, he manages to completely nullify Sterlings wing play by taking up his position far to regularly and completely fucking it up.
Sterling gets pushed to far inside and then Kolorov wallops the ball as hard as he can and hopes for the best. Sterling isn't ripping up trees at the moment but imo is far better at attacking the by line and penalty box from the wing than Alex will ever be, and will get better. Clichy allows sterling to do his job and intelligently over Laps when needed. Clichy also defends far better and crucially knows when to cross and when not to. It's not that hard to be honest, to think about what your going to do with the ball as to not waste it. Alex doesn't have this filter in his football brain.