Sure, but if we make the trade it's because Hayward wants to sign elsewhere. Turner is honestly pretty decent return, I don't see much better out there, and I see a lot of much worse options (signs outright with NYK or ATL, or slightly better, we have to trade assets to make one of those a S&T to just get a TPE).
There is no reason to compare it as Team with Hayward, vs. Team with Turner. The real comp is.... Team with Turner, or... Team without Turner or Hayward.
Hayward opting out doesn't mean he can't come back, but also means you should assume he won't when determining value of a S&T.