Good post. Good question.
YES, there is a better option. The better option is not give WIliams 95% of the carries this year.
Let Corum and Hunter share the load (one, or both) and see if either emerges.
The three most disturbing facts about Williams are:
1. Williams yards per rush beyond what was expected given his blocking was ZERO. Very low among starting RB's.
2. Lack of runs over 10, 15, 20 yards.
3. Incessant fumbling problem; which often manifests itself at the worst possible moment. I think the fumbling may be connected to his ultra-heavy workload. (McVay is a one back coach. He did the same thing with Gurley. He needs to play a few backs like most teams do)