I think Baines is either being asked, or deciding for himself, that he needs to loiter further back to be cover for Williams.
If that's the case, he's not wrong.
Martina's attacking intent (which some are using as evidence that Baines is past it for some bizarre reason) keeps leaving us exposed. Led directly to the goal yesterday, as no-one covered for him while he kept trying to press further forward chasing the ball. That's not to say the goal was his fault, but the lack of cover cost us. Baines is too smart to get caught out like that, and quite possibly doesn't trust other players to cover him. As he continued to show yesterday, he still gets in good crosses when he can get into a forward position. The midfield doesn't like playing him in on the left, despite a regular habit of cross field balls to Martina. And he continues to get across the pitch covering for the rest of the defence.
Past it? He is still easily one of our best players. He is still lacking a decent partner on the left. Sig is either not up to being that player, or is being told to do other things instead. Rooney is capable of being that player, but is trying to play in at least six positions at once..