Lindsey has gambled with 2 FRPs in the last two years, and the results are that Utah is currently sitting well out of the playoffs. At this point, if he gives up a lottery pick for a guy with one year left on his contract, his head should be on the chopping block if things don't work out.
Utah is not in a position to be trading away picks for short term improvement. It shouldn't even be a question. Besides that, if DL was dumb enough to give up our pick this year, that trade would have happened by now.
Some people are overvaluing this guy based on a recent shooting streak, when the reality is that he's almost certainly going to come back down to the guy his career #s say he is.