He is really bad at defending and moving the puck for someone getting first round consideration, doesn't have a ton of offensive potential either. Seems to have no idea what to do with the puck at times and can be a turnover machine. Skates brilliantly, however. No way should he be a top 15 pick but would be decent gamble in the bottom half or top of the 2nd that he can improve because he does make some nice plays at times and really is a good skater.
Saying he is really bad at defending is pretty hyperbolic. Also as a draft eligible defender to have more than a PPG suggests he has solid offensive upside. Have you watched him play that much to arrive at your conclusions?