Let's assume 33% crit with rampage (maybe a little high, considering we will be stacking hit).
1 point in Unending Fury, with a PERFECT rotation gives you:
1 rage/6 seconds (BT)
1 rage/18 seconds (slam, 1 BT crit per 3 BTs)
1 rage/10 seconds
1/6 + 1/18 + 1/10 = .322~ rage/second, or not even 1 rage/3 seconds. And that's with a PERFECT rotation. This talent is worse, point for point, than Anger Management even with a perfect rotation. Blizzard has to understand that we don't need any more rage. A few more heroic strikes will barely do anything for us, especially with the TG change.
Assume a couple 3.8 speed weapons, throw a conservative 10% overall haste from frenzy. Puts em at ~3.5 speed, effectively, not even including any haste you might have. That's 1 autoattack per 1.75 seconds, meaning an additional point in Unbridled Wrath will net you about 1 rage/4.75 seconds assuming ~33% chance per point. And you'll ALWAYS get that extra rage, even if you do miss a WW or something.
Give us a decent T10 talent, blizz! Look at Arms and Prot, FFS. Those one are no-brainers.