Is Marble Iowa's best player? It is debatable, but I don't think he is Iowa's most important player.
The growth of Gesell and Woodbury are going to make or break this team on how good they really can be this year. Both of these guys just have to better on the offensive end of the game. Gesell, one by running a fast break where Iowa scores and doesn't look awkward and Woodbury, command a double team by just being able to make the "easy" shots without being in a huge hurry like his pants are on fire.
Marble's deficiencies forced the move back to PG moreso than Gesell not playing well, plus MG was hurt let's not forget that. Marble is not an effective player off the ball, what is so hard to accept about that? That is not a knock on him, it is the truth and he doesn't match-up well to guys his size that have an ounce of athleticism. He simply is far better and effective when he is a mismatch and credit Fran for putting him back there after the MG injury. Do I think he should be PG all the time, no, but there is nothing wrong with putting the ball in his hands early in the shot clock and letting him work, not a whole lot of difference there, but for Iowa to be a great team he has to be off the ball making something happen.
The key to Iowa this year is going to be shot selection, ball movement and hitting open shots no matter where they are on the floor.