I wouldn't mind this trade at all.
What would be better would be just a straight draft trade.
We ship #3 and some of the 2nd rounders
for #7 #15 and #19
At #7 we will have the BPA out of Bender/Murray/Hield/Brown/Dunn (and on a better contract than picking them at #3, right?)
I think the intrigue of having back to back picks at 15/16 is enough to convince one of the GM's in that 8-11 range to cough up another pick.....and obviously depending on the draft slot, we would also have #19 and/or #23 to move up......which gives us a PF/Big to choose from between Poeltl/Skal/Ellenson
The other thing to consider in this trade-down, is keeping all the 1st rounders (7/15/16/19/23), which makes it much easier to part ways with a guy like Marcus Smart and/or Avery Bradley to then package them both with a BKN 2018 and other picks for an All-Star type player (Butler/George).
However, in this scenario where we trade down with Denver, I would prefer obviously to pick at 7, and then package 15+16 to move up as high as possible, and then also again with 19/23.
Ideally, we would then be looking at #7, #11, and #17
A combo of a scorer/wing like Murray/Hield/Dunn/Brown, then with a solid big prospect like Skal/Poeltl/Ellenson, then #17 giving us that guy that slides out of the top 10 for no reason like in every draft.