And you're basing this off the one or two abilities the wow class shares with the rts ability?
That's completely insane.
If Demon Hunters become a class they will have an entirely different set of abilities than their rts counterparts with maybe one or two abilities for flavor. Just like Death Knights and just like Brewmasters
All of the WoW classes are so far removed from their rts counterparts that objectively the only serve as a rough outline
And you're continuously make huge assumptions and leaps in logic about Demon Hunters cannibalizing other classes when you have zero relevant knowledge to work with.