I would say that the key factor in all this discussion about either xfeeding or not is the XFEED valve itself.
What happens when it is open and you have a bank (which has to be with crossed controls, otherwise gravity will still be vertical)?
I would say that it makes a big difference, in the sense that with the valve closed, gravity shifts due to bank angles will not result in the head pressure on the engine LP fuel valves. With the valve open, however, it might be otherwise. Since the up wing would be the pumpless wing, that might lead to a flame out. Hence, the procedure tells you how to do that only after the engine is already lost.