Bad theory, since every other class is changing as well. Not to mention the fact that Blizzard has stated that all classes will have more stamina in Cataclysm.
Warriors damage is already lethal with the correct gear, to the point that it would be a miracle of Blizzard actually ignored it and didn't give warriors a damage nerf. For Arms, anyways.
I've never had a problem with managing the warrior skills, but rather the 8-10 macros that I need to actually PvP. The class was fairly playable in PvP before it was nerfed every patch of the current xpac. Now Blizzard assumes that, if you are a PvP warrior, that you're running 3v3s or 5v5s with a 2k arena score. Maybe when Warrior PvP is actually accessible to someone besides an experienced veteran, then it will be bearable again. Until then, don't get your hopes up.