This draft is like a mirror to me, very much give and take, whatever you do at 3 instantly reflects what will happen and who will be there at 12.
If the Jazz go Kanter at 3, then Cavs probably take Valanciunas at 4 and you'll see guy like Biyombo get taken earlier than the Jazz. That also means that it is very likely that one of Jimmer or Walker will be there at 12.
If you go Knight at 3, then the Cavs take Kanter, moving Valanciunas down, and Biyombo so the likelihood of one of those guys being there at 12 jumps considerably.
The Jazz will have to have a strategy planned going in beyond taking the BPA.