Having a sleight-framed 6' 6" player and another sleight-framed 6' 8" player without long arms or superb athleticism as your SF rotation doesn't sound like a good thing. Against good SFs, the Jazz would get chewed up. That's saying nothing about most of the minutes at SG being manned by a guy that's 6' 3.5" in shoes.
Did I mention that none of these guys are yet seen as especially good defenders?
Add all of that up, and that's just a small wing rotation.
But again, Beal's probably not there. Portland's probably targeting him even if he's not available when they pick, too.