I really hope they've learned to stop butchering 5 man content. Doesn't matter which way they've butchered it. They've been messing around with this type of content for so long now, they better soon represent a model that is more stable and predictable in the future.
By that I mean, understand that this content isn't any less valuable than raiding, and that it contains a ton of potential and appeal, if you do it right.
Overall, I've had a quite okay experience in MoP, but I've hardly been around, so I never got to experience core parts of MoP character progression.
Flying is another heated subject in my case, but that seems to be set in stone for testing beyond the Thunder Isle, Isle of Giants and Timeless Isle. Nedless to say, it's content I've hardly visited, because I cannot fly there. It makes me feel trapped and claustrophobic, and it ruins my immersion. As I have said before, for me, being able to see something from high up in the air, trigger my senses. I love it in real life, and I love it ingame. The world is so much more beautiful and alive, when you can see it from the sky.