I wont sub then. For context, yes I played Vanilla. Yes, I rode throughout TBC. But those days are gone and if they disallow flying entirely, I'm done. Not so much because I couldn't live without it as because I don't like arbitrary restrictions like this. Every expansion they seem to get some asinine notion (no rep from dungeons, all rep from dailies was the MoP one) and instead of saying "does this make sense, is it good for the game" they impose something silly on the players. It would be especially hypocritical given that they have sold flying mounts for real money.
Oh and before anyone types the silly stock replies....
Yes, I know, it's their game, they can do what they want. So can I.
Yes, I know, I'd still be able to fly in the other parts of the world. This is irrelevant since anyone at 90+ will be spending the vast majority of their time in the new zones.
To be fair, I'm going flightpath -> afk a lot more lately, simply because of the sheer boredom that is flying yourself. But yes, if they really think about that they better make all mounts usable in non-flight zones, and maybe add nicer ground riding animations for some of them.
There are too many design flaws in your game. As a result, your customers' game experience may be degraded. Fire or replace the failing developers if you don't want to see this message again.
I personally think they should stick to no flying until first major patch. Like someone above has said, if my flight mounts can be used as ground I'll be happy. If not I'm gonna be pissed because I have a tonne of flight mounts I've worked for and would like to use.