4-3-1-2 hurts Tevez. The CAM and the CMs, mostly Pogba, encroach on his space constantly. He was better in the 3-5-2 when our wingbacks at least stretched the opposition even though they were as useful as the corner flags.
It is hard enough to dribble around Llorente and the defenders that he's constantly clutching like a father with 3 disobedient toddlers. Then you add Pereyra and Pogba. It's just too much.