If Kyrie leaves and AD isn't coming, having multiple picks this year to take some swings late in the 1st round isn't a bad thing.
If the team trades for AD, well, those picks will be gone in all likelihood.
Also, Brown is too good to use him just to get off some salary.
Hayward is only on the books for this year and next. Unloading him, even if no salary is coming back, wouldnt' unlock enough cap space to be worth it.