I am ambivalent about this issue.
I love flying mounts and the concept of flying, but I also have the brains to identify the issues that the CURRENT flying brings to the game.
This isn't me being self-righteous. People just need to pull the head out of the ground.
Is removal of flying a way to fix the issues? Maybe, but it also guts part of the game.
Is it the only way to fix the issues? Absolutely not.
Is it the best way to fix the issues? Hell no.
I made a thread on the official forums about an extensive suggestion on how Blizzard can KEEP flying in the game while simultaneously reducing/removing the issues it brings to the game.
The Future of Mounts (Constructive)