Which is exactly my point. It at least could have worked for humans if it was introduced properly, which it wasn't. But beyond that, even if done right, it would only work for humans.
But anyway, @
Damaind said it best, there are so many themes for Warriors that trying to shoehorn all Warriors into one common theme was never going to work, even if done properly. Look at our history, European knights, Japanese samurais and Vikings are all warriors, but they are also so different in so many ways.
The best they could have done IMHO, is to create a new order whith every spec being radically different thematically, with prot warriors being closer to Knights, Fury warriors to Berserkers/Vikings and Arms warriors to Battlmasters (in the sense, cold and calculated). That's the only thing they could have done that would please the most amount of people, because there's no way to create something that would fit everyone's fantasy about their warrior.