He is too lacking in aggression for someone with his build. I never took him to be a smart defender but I took him to be an all muscle-no brain defender which could be very useful (like Pepe). So far he has really disappointed and doesnt show the kind of aggression or even effort that I hoped he'd have. You can say all you want about Pepe being as dumb as a rock but he hunts down players like a mad animal and thats what I expect from Ogbonna even if its at a lower level.
Now I am hoping that Allegri can be to him like Conte was to Bonnucci. I am hoping that Allegri can figure out a role for him where his strengths are emphasized and his weaknesses are limited. Does anyone see in him any ball-playing ability? Because if he is neither a smart defender (silva, Barzagli) nor an aggressive animal (pepe, chiellini) nor a ball player (luiz, Hummels, Bonnucci) then he is just shit. Maybe we can loan him out to another team so that he gets 1st team football regularly and we could evaluate his strengths and weaknesses better? I don't want to give up on him because he is young and we paid a good sum of money to have him.