I don't think Jazz will go small 5 unless they have to match defensively. Screens and Rolls having gravity is what Jazz live off.
May be if teams try to take away the screens like Clippers did against us but then again we could go Gobert/Paschall with the way Paschall defending and attacking the glass and forces teams off small ball.
I really need to see more and think. I haven't been interested much this season.
Jazz also have been doing different things defensively. I have seen some hard hedges that I don't think are the answers but we will see.
Paschall would be a beast in the screen and roll game as a 5. He would be like Harrell with a spaced floor.
Defense/rebounding is the much bigger question. Whiteside and Paschall both have their strengths and weaknesses there. I don't love the idea of matching up to small ball because the whole point of doing that is you can matchup 1-5 but the Jazz have issues matching up 1-4 already. I do like how it forces the other defenders to engage and be more active, however. It may not be effective as a whole, but it builds better defensive habits.