To me the upgrade priority is small forward. We have point guard settled at least for now. Calls for some superstar or even an All-Star at the position place too much need there. Tre is more than fine. I love Julian, he just doesn't provide a lot as a starter.
Whether it's through the draft or otherwise, that's my key right now, although there are other needs to address as well. This draft has a number of SFs that will be available, each bringing a different package of value in Buzelis, Holland, Ruzacher, Williams.