In the World of Warcraft Patch 2.3.3 known issues list, Endless Rage was listed as not granting Warriors the correct rage generation. Considering that rage is used to power a lot of that class' skills this is a very important problem that needs to be addressed. Thankfully, Blizzard plans on doing in Patch 2.4.

Community Manager Bornakk said that the fix in patch 2.4 should have Endless Rage producing significantly more rage. He added that while they don't have exact numbers,  "it should be a notable improvement from what it was providing to get it on par with what we wanted."

So there you go Warriors, it looks like you'll be getting a fix for this skill after all. All we have to do now is wait for 2.4 to go live to see how much rage the revamped skill will produce.