I can see value in having new FOs with extensive international operations in a domicile that, for a decade, was the most junior in the left seat.
A new FO out of an RJ paired with a new CA who upgraded from SDF 757 or Bus, along with a recent hire flying supermid bizjets, *could* be at higher risk for errors than if each person had a lot of crossings under their belt.
That said, I don’t think either the airframes or operation are rocket surgery, and plenty of folks get little more than a IPC before blasting around the world in a Global or Gulfstream without issue.