Centaur and Elken both get the trailmaster passive due to those sturdy legs!
I know that you are on a much different version of the game than we are but Trail master has not been anything I have considered that useful and from your quoted response above does not seem like it has changed in the new build. Trail master/blazer was never anything that I would take into account when making a character and weighing the pros vs cons of one race vs another. IN our version of the game you just use a mount for the same effect and there is no opportunity cost to using a mount. In a lot of situations a mount was better than trail master/blazer anyway.
Also, I want to see Centaur's run faster while in combat. Something like 10-15% faster in combat would really open the race up to being considered for classes other than Champion and the occasional Knight.