Then you did not play vanilla. Flying was the single most requested feature this game has ever had excapt for maybe dual spec.
You are wrong.
Flying was introduced cause gamers wanted it. Travel sucked ass on a great man levels and was a needless time waster. Gamers wanted to get to the "fun" rides on the theme park, not wait in line for longer and longer periods of time wishing they were on the ride.Flying was never introduced as a "man, this game sucks without flying, it's hindering gameplay" like instance queues were. That's what I mean by quality of life change.
Flying was one of the biggest quality of life additions to the game. If you had played at all back in vanilla you would know that.
If you played TI you know what wod will consist of. You don't need to waste $50 for a guess or a "wait and see"
There is a way for you to know and not wait till beta. Get in game, head to TI or one of the other areas like it and have at it. No make a decision on if you want to pay for an entire expansion like that.
I sure as hell would not.