Indeed. Actually, there are two questions for Brooks coming in: Can he play the point and can he beat out Poole?
I'm not sure there's room for both Poole and Brooks in the rotation next season. Until proven otherwise, we have to assume Beilein won't go deeper than 8 (and that he'll be conservative when it comes to deploying true freshmen).
Those 8 figure to be:
--a starting 5 of X-MAAR-Matthews-Wilson-Wagner
--a backup big (Teske or Davis)
--a 3rd guard
If Brooks can credibly play the point, that gives him a leg up on Poole, since we're far from knowing whether X can play Walton-level minutes at the point. But if Poole is just plain better, maybe you try to get by with MAAR as your second PG. Not sure there's room for all four of X/MAAR/Poole/Brooks unless there's a change in philosophy.
Incidentally, this exercise also makes you see how difficult it might be for Livers and Watson to get real minutes next season. Of the 8 rotation slots, there's still an entrenched quartet of players in MAAR/Wilson/Wagner/Robinson, plus the need for a second big, 2 more guards and an athlete (Matthews). Don't see where those two fit in unless they blow people away in practice and force their way onto the floor.