This.I think this is a great question. Some things just won't be improved much, in any player, no matter the amount of work. Do people think DeAndre Jordan just doesn't work on free throws?
As for Asik, I think he can improve on his communication and his anticipation. Right now, he is playing with a bunch of new guys. But year 3 with Jrue or Tyreke, he will anticipate the passes and know their speed, where they are likely to be, etc. That will help. It will appear that his hands for better, but in reality it will be a result of familiarity more than anything