I think it is unlikely Williams plays. He is listed on the depth chart – but Susan often lists players who are definitely out for the upcoming week. I think it is telling that for the first time they just added a freshman RB to the “two-deep”, giving them four RB’s on that list.
Agree about the D not having been tested a lot. One issue is that it is young – currently starting six sophs and one frosh. Top CB is out, as is the FS. May well have issues on pass defense.