I don’t think Williams is better than Van Aanholt. That said, I think we’d need to make the difficult decision to let a left back go if we are to bring another in anyway. I see no sense in buying a third left back. When I made this thread it was always more on the premise of us selling Shaw, which is what I feel needs to happen if we decide to bring a new LB in. Williams isn’t good enough to be first choice, but is a capable understudy. If Shaw’s persistent injuries are going to make Williams the de facto first choice, then he would be the one to replace I think.
As it stands, so long as he can stay fit, I’m okay with Shaw, all flaws considered. His injury record in recent seasons have been frustrating and terrible though.