For what's it's worth, I'd definitely take the following guys from the 2013 draft ahead of Kelly:
Giannis
Gobert
McCollum
Oladipo
KCP
Porter
Edit: Noel too, duh.
I think Kelly is in a mix in a group below that along with Dieng, Schroder, MCW, Plumlee, and Adams, with the order depending on what team needs are.
In short, Kelly was, at worst, drafted in just about the right place, and was maybe drafted 4-5 spots too low.
I'm not concerned with bemoaning the fact the Celts joined half the league in passing on Giannis. The reasons for why teams passed on him are not hard to figure out.
Much more interesting to me is why Rudy Gobert was missed by practically everybody.