I don't get this. You say UK will likely end up with Simmons, even with all the players they might have coming back, but in the same breath you say they won't end up with Fox because of all the players they might have coming back. So, why is it you're convinced they can add Simmons in that situation, but not Fox?
Anyways, there's a reason Cal has been/is slow playing Simmons. If you'd have been paying attention, you'd know exactly what that reason is.
Edited to add: Not to mention, out of all of the guys you named that supposedly make UK "crowded", none of them really affect Fox's minutes. Matthews, Mulder and Willis are completely irrelevant when it comes to Fox.
We all love Hawkins, but let's face it, he's a role player (who is very happy with his role, btw). Briscoe will spend 1/2 - 3/4 of his minutes this year playing off the ball, so him having to do it again next year won't be a problem; especially, since he'll be more accustomed to it.
Ulis is even going to spend time playing off the ball this year, so, again, not that big of a deal next year with Fox on board. My point is, Fox could easily come to UK, step right into Murray's spot and easily play 25-30 minutes a game.