It has been a while since I started this topic.I never understood taunt because it will just get you killed... And why would you want to do that? I mean, if your a low level in a room of enemies and you use it, your dead.
Now I'm a level 80 tank with 2100 hp, and taunt maxed at 15/15.
I can tell you that taunt is VERY useful to keep the aggro when you are in a group fighting a boss; The DPS-dealers of the group might not want to see their low hitpoints reduced to nothing just because they hit harder then me!
Anyway, what I would love to see in an upcoming patch of the game, is more details/numbers about some Skills, to have a concrete view of how effective it is. Concerned skills for warriors would be: Taunt, Shieldbash, Frenzy.
Also, a good thing to add would be some extra information about what happens to a skill if we spend points on it (For example: Do I want to upgrade Bandage Wounds one level higher regarding the additional heals and rising cost of energy?)