I think you and some others are confusing the question. I think his jumpshot is fine by now after all this time in the D-league. He is basically one of the top players in the whole D-league every year, but I'm guessing age and size has prevented him from getting a callup, along with bad timing as said earlier.
No.....he shoots closer to 20% than 40% from three point range. The D-league has unfortunately not improved his shot.