I'm high on Fox as everyone on this board is, but trading a 5th and a 10th to move up a spot or two is just a horrible decision, especially in this years draft where I honestly don't see a guaranteed multi-time all star. I think Fox is better than Ball, and I'm sure everyone reading this does too, but let's assume that the consensus is correct and Ball is actually the better prospect. The Kings want to trade up one or two spots for the 3rd best PG in the draft? When there is already a decent chance he falls to them anyway if they just sit tight?
In every draft, but this year especially, if I were a GM my goal would be to get the odds as high as possible that you get at least one all star or high level starter from the draft. You really can't be certain that Fox will turn into a top 10 PG in the league. If you take 2 guys in the lottery at picks 5 and 10, their odds are probably slightly worse but pretty similar as becoming elite players. The difference is it gives you two chances instead of one.