I'm guessing Locke will get a bunch of emails and address the tradition of riding the starters through all OTs. I don't recall any NBA game in which there were a lot of subs during OT.
Just a guess, the closers are the closers. It's their responsibility to close the game.
I think the Jazz would've been fine doing that had Ty not exhausted them in regulation. Remember when I said he left the starters in too long? They were gassed at the end of the 3rd quarter.