I'm surprised that anyone might not see the command gradient as not being a (potential) problem.
The difference between airline ops and small aircraft of course is that one has room for a SFO or other supplementary crew during a trainee's first few sectors and the other doesn't. Line flying in airlines can be more 'by the numbers' and therefore easier to pick up in the early days. Put these two together and it's easy to see how 200 hour FO's will struggle.