I personally ditched improved weapon totems for extra dodge, back when it still was an occasional life saver against cleaves. The benefit isn't huge, from what I remember at 60, the benefit of having improved weapon totems was a 5 dps gain for everyone getting it. Not overly much, but still a decent enough boost.
I'd probably respec back to it if we had more dps warriors around, we're pretty feral druid heavy, right now I don't drop WF totem enough to make it worth the 50g to respec

Still miss the battleshouts though.