I think Williams has a relatively clear path to #9thMan playing time.
The reason Petro didn't work out is because he didn't give you the things the team needed. The 9th man is all about providing what the top 8 lacks. On this roster, it's defense AND size paired with athlecism (we have size, but not paired with athlecism).
You could make the argument Lincoln's walking in as the second best perimeter defender. At worst 3rd, behind Stojakovic and Coleman.
Remember how freshman Sencire would get the crowd into it with defense? That's his path to PT (albeit on a better team). And I do think he's a better prospect given the size and athletic profile (and hopefully, a little bit of a better shooter and scorer).