The one thing Tobiason really has going for him at point is that he doesn't turn it over. You might be right, having Tobiason slide over to point guard when Dual is resting might be better than Moesch.
Wilson, White, Mahmutovič, Doty and Tobiason could be our best offensive lineup and still hold its own defensively. Dual provides more defense and possibly steadier point guard play, with less overall offense.
If I were guessing a JB style 7.5 rotation, it would be Wilson, White, Mahmutovič, Tobiason, Doty, Dual, Goodrick/Sibi, with Anthony getting regular playing time and whoever loses the PT battle at backup center and Moesch being an emergency player.
At this point, Moesch is the fifth guard in a four guard rotation. Possibly he beats somebody out as the season progresses, or he can fill in if somebody gets injured.