Really though? So many PnR plays are done from the 3pt line or close to it. So then if what you say is true and there's no point in rolling from the 3pt line after a screen, he might as well just pop every time for 3.
I am not saying don't get Vuc more post touches, I am adding to that and saying he should get more looks moving towards the basket in general.
This was not that long ago and the very first play is Vuc rolling from, guess where...the 3pt line.
Here's one with the good and the bad, still shows him moving from near the 3pt line to the paint against a good post defender who is probably faster than him (Nerlens Noel)