He has talent galore...no argument there. He is smaller framed than many that play the position. Once a knee is injured it is never 100% again although some of the moves he made this year would make me question that statement.
All that said, he is flat out injury prone and has damaged knees to the point where I do not see him a "game changer" type of player in the future and rest assured IF he comes back from his, and injury strikes again, retirement is the only option.
Sad case here, he is one talented cat.