Yeah it's no sure thing that he'll even be there. Utah could use a small forward, and they're likely to strike out on trading up for Parker.
Smart is arguably just as good or even better of a prospect as Gordon, and Vonleh would make some sense as well, so it's ultimately not the biggest deal for me if we miss out on Gordon.
But I do really like KO and Sully, and getting an Aaron Gordon or perhaps a Luol Deng is just about the only way a Sully/KO frontcourt could work.
For that frontcourt to work, you need a big and athletic and versatile and intelligent SF, who can also gobble up rebounds and score inside, as well as defend athletic PFs.
And if we end up taking Vonleh, he might be more redundant than we'd like, and might not ever develop into a much better center than KO or Sully.
Smart could be a great shot in the arm for this team, but you have to wonder about Rondo and how the two will gel on the court. I'm also a bit concerned about Smart's weight over the long term, since he's already pushing 230. His body is naturally going to be inclined to gain more weight over the next few years, and it's going to affect his agility and quickness as a PG. As a shooting guard that additional weight will be fine, but he'd ultimately be a 6'2" barefoot SG with a questionable outside shot. He'd still be a beast, but Rondo + Smart isn't an ideal backcourt.