So new Enraged Regen (warrior) = 30% total health over 10 seconds, 15 rage and consumes an enrage effect preventing you from being enraged for 10 seconds. 3 minute cooldown.
Frenzied Regen (druid) = 30% total health over 10 seconds, 100 rage cost. 3 minute cooldown.
Will they perhaps be changing Frenzied Regen as well?