I do agree Beto coming off changed the game, but for me Barry coming on was only that much of an issue because we weren't willing to change how we were playing and get players up around him, which is what he needs.
People may prefer Beto over Barry for a variety of reasons but they aren't the same type of player and need to be used differently.
How many times in that second half did we play a ball over the top to a player who's completely isolated because we weren't willing to commit men forward. Beto is a battering ram that might get something out of those situations by himself against the two centre backs, Barry isn't that player at all. Ask him to do that job and he's useless.