Marin never got a proper chance. Most(if not all) games he started the team either didn't include Mata or Hazard or both. e.g QPR, Southampton, Bucharest. He was injured for the first couple of months. I really believe that if he plays alongside Mata and Hazard or a few matches he would really start to shine. One thing to remember, Marko Marin is a winger and not a CAM. His best seasons at Werder Bremen was when he was a winger and Ozil was CAM. His dribbling, passing and crossing is much better than Moses. Moses simply works much harder and is better defensively. I really hope Chelsea give him a chance.