Well, the head coach has sole control over who's active on game day, and the General Manager has final say on who makes the 53-man roster.
Draw your own conclusions about what this means.
The GM gave the HC insurance incase we had the same type of injury bug as last year at RB when the HC wanted his guy, an injury prone RB, to be the guy. The HC has not needed to go there and is instead is letting the young guys get experience instead of someone who is likley gone after this year. That is my conclusion and it seems pretty sound to me and I have no issue with Williams there just in case.