My ideas may be crap, no question. But the point wasn't "take my ideas instead," it was more that there were a lot of other options out there. I've seen some other ideas throughout the thread that also might have been cool. As it was, it just felt like Blizz is forcibly painting her to be evil. Her being evil wouldn't be so bad, but as far over the top as they went...?
That being said, I'm not sure mystery on both sides would be all that bad. We don't need to know the villain of the expansion to start with...that was part of what killed the MoP story for a few people. Imagine Garrosh doing horrible things and the rebellion started, but we did not know he was coming.
This way, they've painted themselves into a corner. How can a Tauren go into this next expansion and feel at all good about what they are fighting for? As a Night Elf, my answer about what I'm fighting for is easy. But a Tauren who loves nature and just saw Teldrassil burn due to a snarky Night Elf? Mystery on both sides allows for that Tauren to have a good reason to fight, this does not.