Agreed, the fact is (as they have stated) that when 2.4 hits, the people that PvP will be doing Arena's. Ranked Warzones just won't be as popular. And since the system wasn't supported enough, I think it's better they just scrap it, focus on Arena's, get the support in for them to work well, and later in the line add Ranked Warzones back in a more functional and compelling state.
So what about those who're in this game only because of 8v8 rwz? Why remove a gameplay that there was nothing wrong about?