Message to User:
Blizzard hates your class.
Seperate weapon masteries might be important for PvP balance, so a warrior can't pull out his mace for stuns when fighting certain classes, and then switch to a sword or axe when he'd rather have the extra burst potential. Making the player choose between being able to control, do burst damage, or do potentially really high but less reliable burst, is a valid reason to keep them seperate.
Or blizzard is really clueless as to what to do with warriors like they have been for on neigh 2 years and all the weapon specs are there as fillers to give the illusion there is an actual choices in that tree.
With all the homogenization of the tree and classes, as well as the outrageous hunter trees, they better pull a rabbit out of a hat pretty soon....