One thing to keep in mind as far as that goes is that freshman at Michigan only play 1 of the 3 positions. It’s something that Anthony Wright said on Twitter prior to last year’s season and it really does seem to hold true. Basically, learning both the “guard” and the “wing” position is too complex for a freshman. So, I think it’s pretty likely that both Poole and Brooks have been slotted in to learn guard this year, and thus will be restricted to the guard spot.
I believe that Ibi was slotted in at wing and then only played the wing position all year last year. It’s possible that they decided to slot Poole at the wing position, but I doubt it, I guess.