I lead a roleplay guild, so not having enough to do for me isn't really an issue. I run adventures to create my own content.
Would flying be something great to me? Yes. Hell yes. I love flying. It's freedom. Lets me quickly explore and plan stuff, and it's immersive. No longer ground-locked.
Do I think Blizzard should give me what I want on this issue? Nah.
Blizzard didn't just randomly decide on "No more flying". They were beaten to death about it by people that wanted it gone. They weren't the majority, but they were many, and loud. And Blizzard became convinced they had the right idea, and that it was what the people wanted. Obviously the backlash was huge, and so they partially went back on it. But the people that wanted it gone still exist. Some are in this very thread. So it would be a lie to state that everyone wants this, and that Blizzard giving it to us now would please us all.
In the end, we're living in times of compromise.
Some of us want it asap, like me. But at least we know it'll come eventually. We want it enough to gladly jump through the hoops to get it, as long as it can be obtained.
Then there's the no-fliers. Those that oppose flight and feel it ruins the game. At least they know it won't shop up in content that's still relevant.
There's also the people that just don't care about flying enough to put in effort to get it. That's fine. It's no issue for them.
The group that annoys me personally is the group that wants to fly, but not enough to actually unlock it. Only enough to complain about not having it handed to them.
The current situation is a compromise. If you're on either side of the issue, just be glad Blizz didn't fully side with the other side. Flying as reward for participating in the world's outdoor activities is a fine compromise. Even if I would rather have flying this very second, I can recognize that not everyone feels that way.