Mexes can play deeper. The reason why he could be a good partner for Chiellini is because he isn't poor with the ball -- he doesn't needlessly blast it up pitch like our other defenders over the years. I would like to have someone intelligent with the ball at the back, which is why I wanted Marquez here a few years ago, but it's too late for him.
I've no doubt Mexes would improve Juve's play when in possession, but I do have my concerns about his ability to make a solid partnership for with Chiellini.
