Quite agree with Fursty, did it for years in the sim without and issue but now my outfit want you to go through the whole fuel imbalance procedure and not just open the x-feed which needlessly increases the workload in an engine out situation and could quite easily lead to the remaining engine running dry in the event of a go-around etc. No idea if the change came from Airbus or our trainers, suspect the latter as keeping it simple is not one of their mottos!