It is pretty clear that the Jazz are imagining Hendicks as a 3 and are playing him there. He'd struggle a lot less as a 4, but they are still making him a 3, which seems to signal they want Lauri as a 4 long term.
Eh, his role on offense is going to be the same no matter what. He's a standstill shooter. I don't think that even people who were high on him saw much else in his game. Defensively, he's whatever he ends up good at. He needs to find a way to contribute on that end. Don't think he's good at guarding bigger guys, smaller guys, or helping off the ball at this point.