Would you trade the #2 for #3, Kanter and the GS pick (let's say it's 11-13 range).
Basically, you are trading Parker for Randle/Exum/Embiid/Gordon/Smart, Kanter and another pick. You could draft Smart and Young and you would have traded Parker for a starting PG, SG, and PF. Is that enough for a kid that will come in and score 20 ppg his rookie year?
If I were another team then yes I would do it but I wouldn't if I were the Jazz. That is way too much to give up. You don't think Kanter #3 and GS pick can't match or exceed the #2 pick's numbers.
Say Parker comes in and averages 21 pts and 7 rebounds. I rest assure that Exum/Embiid + Kanter + GS pick (14th pick) could easily match those numbers put up by Parker.