I understand that people enjoy flying. I'm sure it's fun. But that doesn't make this true:
I meanif they want to make an MMO that will compete with other MMO's they need to include flying mounts.
All flying does,in reality, is provide transportation. Something easily, and perhaps better, done by a network of teleports. Yes, I understand flying is fun, and maybe we'll get it in some form, but don't assume that it "must" be there because that is not the truth.