Touch tight?
Genuinely not being condescending but at any level of football if a defender isn't blessed with pace, which Baines isn't, you are told to retreat and reduce the space behind you. You can't be getting tight to pacey wingers high up the pitch. It's suicide.
What he needed to do more though, and he is now, is press high when the winger is facing his own goal and force him to go backwards.
Barry is now doing that too. Again because he doesn't want players turning and running at him with space in behind.
I take your point on crosses though. When there isn't space behind him, he needs to shut the space down and stop the cross.