The real question is if Robinson is an upgrade for the Jazz at all, not including Jefferson. Will Robinson be better than Kanter or Favors? I just am not sure. I like his game but I see him as a more athletic Millsap without the range on his jump shot.
Considering at this age Millsap didn't have range outside of 10 feet, he is a bit ahead of curve. Robinson is also a good 2-3 inches taller than Millsap, and a bigger body.