Scribe
Legend
I dont think I agree with this, at least under the most basic assumptions of 5e.It really doesn't.
All it requires is for people to stop thinking of martial as mundane. 5e has plenty of existing mechanics to make it happen - superiority dice being just one example.
Its just too basic a framework, to me, to provide enough distinction. Martials (basic Fighter as the poster child) should be mundane. The problem comes, again just my view here, in the fact the underlying mechanics are so simple, magic is a catch all answer, magic items have been relegated to some kind of optional system, and...yeah.
I dont know, I think it could be resolved, but for me, I dont think its going to be possible in 5e without a supplement like Level Up, and even that isnt going far enough for me.