If by 'just a guy' you mean Williams is an average NFL RB - I agree. His yds/carry is literally the NFL median. I think Williams, a former 5th round pick, is actually a better back than his stats might indicate. When he was called on he ran hard, especially in short yardage situations, and he's also got pretty good hands catching the ball. But to your point, we've got two really great ones, an average sub, and nothing else. They've got to move on from McKissic both because he can't stay healthy, and because he probably needs to retire before he gets permanently hurt. Patterson? I'm not really interested in arguing about him. He looked good at the end of the year in garbage time but I think if he were a #1 or #2 capable back we'd know it by now.
So maybe you are right. I guess I was making my statement in the context of 'of all the things we need, RB is not among the top 3 or 4 areas'.