Hopefully Vlade is just really playing his cards well and seeing what kind of potential trade value he can get (if needed) because I really think the Kings would be making a big mistake if they don't draft Luka tomorrow. The only viable alternative to save face would be to trade down to the 3-7 range and acquire another pick.
Granted his foot speed is a concern but I've seen enough of Luka now to realize that his basketball IQ, passing ability, leadership, and heart/desire are really rare and they're especially rarely all visible in a 19 year old. He may never be a superstar himself as a scorer but as I've mentioned before I think he has the ability to help a guy like Fox or Giles turn into a superstar and also make guys like Buddy even better.
When you think about NBA busts, how many obvious ones are known for having a great basketball IQ, leadership, making teammates better, good bal handlers, and play with heart/desire? The answer is not very many. Guys with lots of innate unteachable intangibles generally don't fail.
Most early round busts are guys like Thomas Robinson and Ben McLemore that are great athletes but lack basketball IQ and intangibles. In the case of McLemore and Jimmer, both were also poor ball handlers for their SG positions.