Just an aside, I remember something that occured to me when they changed whirlwind to hit with both weapons.
Due to the fact that I was unsure whether bloodthirst could proc weapon effects, being that you can use it while unarmed, there seemed to be no disadadvantage any more to using a proc enchant on your offhand as a warrior.
Pre level 40, without bloodthirst to worry you, the effect is even more pronounced, even moreso now that hamstring does no damage and falls into that uncertain area.
Assuming hamstring no longer procs weapon enchants (which seems likely as sword/wf procs were one of the proposed reasons for the nerf), all that you have left that will proc them are white attacks, whirlwind, and pummel. Whites and whirlwinds will proc just fine from the offhand, so you're only really losing chances to proc from pummels.
Procs on your offhand may work just fine now as a warrior. I think I will do some testing this weekend.