Lack of fundamentals, effort, intelligence? This is the problem I have always had with Andrew Wiggins. I said as much in the draft process. The dude is hailed as this supreme athlete, but he rarely looks like this hyper athlete on the court. How is he putting his athleticism to use? He always seemed so spindly, and rarely actually getting up there unless it was an uncontested dunk.
Parker on the other hand was considered this sub par athlete, but always looked way more athletic in game. This dude was taking the ball coast to coast and yamming on people. That has translated to the nba. Parker is always looking to put guys on posters with his "sub-par athleticism." I've never seen Wiggins do this.
Check this out. This guy mentioned all the things that bothered me about Wiggins before we even drafted him. He barely actually uses his jumping ability:
https://medium.com/@NateDuncanNBA/wolves-defensive-issues-1dec9760856a#.8hl8iy99k