I think the Multi-crew licence is just a quick fix to put pilots in the right hand seat F/O without thinking of how they will cope with being a captain one day. How can doing pretty much all your training in a simulator train you to fly the aeroplane in command when it comes time to go for your command training or cope with an emergancy situation if the captain is unable to do his duties. Sure they say they will be trained but It will be interesting to watch a newbie with a few hundred hours handle an emergancy on their own if they have never experienced single pilot flying in the real world!