Taken from Curse's compilation.
Devastate - Now applies the Sunder Armor debuff per use, unknown if the threat has been modified to make it equal to Sunder Armor at lower stack levels. Would allow for less button-switching while tanking at the very least. Devastate now also effected by talents/abilities that modify Sunder (i.e. Imp. Sunder, so 9 Rage Devastates ftw).
TM - Adding a passive effect to TM that will 'greatly boost' the threat generation of Bloodthirst/Mortal Strike while in Defensive Stance.
Mortal Strike - Will now effect Drain-style effects. Read: Mortal Strike now reduces Drain Life from Warlocks. Bloody finally.
Mace Spec - Nerfed the chance, but the Rage proc bumped to 7 Rage. As it is currently 1.75 PPM (re: Tseric), if it maintains the same amount of overall Rage generation as it currently maintains at 6 Rage per proc this would move it to 1.5 PPM. With a 3.8 speed weapon this amounts to a 9.5% chance to proc per swing, as opposed to the current 11% chance to proc. It's a nerf, but it's not an immense one. (Note: It's possible that they did not maintain parity for the rage generation, in which case all bets are off).