Sigh, why do I have to go over this with you? It's really basic math at this point.
Screw garrison, follwers, lack of content, etc etc etc, ashran, blah blah blah. Who the hell cares?
Let's talk math, k?
MoP retained around 7.5 million subs.
WoD on the other hand, the last numbers we saw were around 5mil and dropping, dropping at such an alarming number that Blizzard stopped reporting their numbers and doesn't even wanna talk about it anymore.
That right there should be a hug factor in why Warmane shouldn't do a WoD server. i could go on and on about why else it'd be a bad idea at this point, but I think I left you with enough to think about and if you think those numbers are wrong, then one of us know's more about WoW then the other and I'm betting that person is me.
Peace