The line is absolutely awful. Nate Davis appears to be trying to get cut in order to take his guaranteed money and go get even fatter somewhere. The desperately needed a center, and got a 33/34 year old guy who was the 5th best FA on the market. Shelton is an emergency back up at best right now.
Poles and Cunningham are supposed to be o-line guys, and they did not put together a decent line for Williams. The only saving grace is they have played two excellent defenses to start the season, and this season was always a stepping stone to what should be years 2-4 of Williams' career when he's still team friendly money wise and a decent cast can be assembled around him.
Hopefully his body isn't wrecked by then.