This has the potential to be really interesting. If SWR does indeed guarantee a second person on the train, as in, it will not operate if the second man is not there, just as currently, but the driver operates the doors... will the RMT still complain? If that's the only change in the role of the guard, then there will no longer be any argument about assisting disabled passengers or having two persons in an emergency.
I agree albeit there are also the safety concerns expressed. I expect an issue, as has been seen elsewhere, would also be the length of validity of the assurance ie does it only last to franchise-end?
