Everyone seems to judge the difficulty of flying multi engine aircraft based on EFATO handling. In fact the likelihood of losing an engine between lift-off and blue line on a light twin, or right at V1 on a 'heavy' is really quite remote. If the failure occurs before blue line in the twin, how hard can it be to make the choice to land ahead? If it happens at blue line, how hard can it be to fly that speed and feather an engine? We practice for the unlikely, and become quite proficient at it. What I am banging on about is flight MANAGEMENT of more complex problems which bugsmasher pilots (sorry) may not have training for. Electrical failures, icing, pressurization, high altitude upset etc etc.
Bring on mandatory checking of the training/checkers....and bring on mandatory annual or bi-annual full simulator refresher programs for all who fly the flight levels at 6 miles a minute. Anyone with the brass for a VLJ can afford this. It's patent BS to say that the imposition of some extra mandatory training will destroy the viability of a 3 or 4 million dollar 'toy'. If it's that financially marginal, stay with that old Cessna 310.