Iirc there's a potential desire for driver only operation the crossrail line (pending discussions with unions etc), but for the main services they were pretty clear in the green signals interview that they intend to keep the guard. Tbh I think a world where the guard is more a customer service and revenue protection role would be far better for customers. It's awkward sometimes when you're asking a question and the guard then has to apologise, run off to do the doors and then come back.
From a revenue protection perspective it seems like it would be worth keeping the guards even if they don’t deal with the doors. Fair evasion is rife on Manchester’s Metrolink network even as they’ve tried to crack down on it by having armies of roving ticket officers getting in and off trams or guarding the entrance of a stop while shouting at people to tap off at the nearby machine - but that’s not really a very friendly customer experience.
