Been reading the various posts on this change and I personally feel like the underlying reasons go back to wanting to keep dragon riding relevant for Drakthyr and possibly to fix issues that excessive speed cause in older content where the game just can’t handle it sometimes.
It sucks for those that enjoyed it, but alpha is the best time for them to change this before it becomes an expectation that can’t be delivered. There’s always a chance it could be changed back but with how some players are reacting and not allowing discussion from both sides it’s only muddying the waters.
I know that not everyone shares my opinion this and thankfully we are all allowed to voice our opinions on the forums. We just need to all avoid getting so worked up over it when the change has only just been made. Give it time for further testing by those on alpha and see where it goes. This a unique racial and as such blizzard is learning where they want it to fit in with their game design.