[EenKogNeeto]

The changes i would make to Mono classing...
Since they would lack the utility of innates, passives and other skills from subbing a different class.

Snipped a lot, to say that while monoclassing you do get a relatively unknown buff in the form that both class slots apply the stats from the class. So for example a monk gets 2 str 4 cel 4 skil 4 def 2 res.
Your idea seems like an extension of that though.