Murphy and Thomas are scrubs. Williams is an UFA who may or may not be back. If he DOES return, he's better suited to a SF role. Evans is a tweener who likely won't be re-signed after his contract is up. You can get better value from a drafted player on a rookie contract. Besides, the roster spot is better served by finding a big with size or a "3&D" SF.
Tomic coming over COULD change the complexion of the draft for Utah. I think Vonleh is BPA, but bring Tomic over and the Jazz would have to draft SF or guard (Gordon or Smart). I'd be ok with that, even though I think Vonleh has a chance to be special. If the Jazz go with Smart, then I think Burke would be the eventual casualty...but not for a year. You'd have Smart and Trey split minutes this season. If Smart is clearly better, then you look to trade Burke at the deadline or next summer. In that case, leaving Neto in Europe makes sense; there just wouldn't be playing time for him this year. However, draft Gordon and you could have Raul as the backup PG.
Reading between the lines, I think Perrin has disclosed a LOT. The possible "franchise-type players" that are three or four years away have to be Vonleh and Gordon. And I think they'll trade out of the remaining picks or draft and stash players.