I don't see Fran offering Williams unless Fran believes he can be a PG.
He looks to have solid athleticism, good handles, and great length. I like that Fran is not getting too caught up in getting a "true" PG, SG, SF, PF, or C. Of course you need ball handlers, and of course you need size, but at the end of the day it only matters if you can play. If we have a team full of talented and athletic guys that range from 6-5 to 6-9 we will figure out how to distribute the ball, and how to rebound the ball as a team.
Marble was not a "true" PG but he was the best PG we have had in a long time. Jake Kelly was also a very good PG when given the chance to play the position even though he was also not a "true" PG. Williams looks to have a similar skill set to those two (except not as pure of a shooter as Jake Kelly was coming in). Marble was not a good outside shooter coming in either, but he worked on his game tirelessly and became a very effective outside shooter. I doubt Williams can do the same, because frankly I've never seen someone improve their outside shooting as much as Marble did, but even if he doesn't he can still be a very good player.
I'm very interested to see how this recruiting class does next year. I see a lot of potential, but as others have mentioned, it doesn't rank well against the rest of the Big 10. Recruiting rankings are far from perfect, and as far as we know this class could end up being one of the best in the Big 10 once they're done, but as of now the only objective measure points to this class being in the bottom half of the Big 10.