See, the nice thing is that we can re-sign anybody that is already on our team, even over the cap, so that includes the entire core and our vet additions too. The Jazz have already shown that they will go over the cap for a bit if it means putting a winning team on the floor, so if they want to keep Hill/Johnson/Borris, they can and will, and still keep the core intact. As for Hayward opting out, he'd be stupid not to, and I think he wants to stay here.
And if he leaves, guess what; we have 14 players that can fill the spot plus whomever we draft next season. Sure, he'd be missed, but that's the breaks.