I cringed when i heard Cameron say "competency based training" as though that was a good thing. That is another topic in itself
Simulators are too one dimensional in that they replicate Weather and visuals and Systems failures, but the Don't PROVIDE EXPERIENCE with the REAL world. EG, Language problems, Radio problems, the thousands of little swiss cheese events that one encounters and mitigates every day on the line.
For my money the Multi crew licence is an accident waiting to happen by placing far too much emphasis on the Captain to manage it all.