Strong bursts, please. Right now, the best time to use recklessness is still a topic of debate. If it is reduced to 10% every minute it'll just be macro'd into bloodbath and forgotten about until blizzard gives it the deadly calm treatment.
Compare the dps timeline of:
http://simulationcraft.org/520/Raid_T15H.html#player25
to
http://simulationcraft.org/520/Raid_T15H.html#player2
Lowering the magnitude of our cds would remove the valleys and peaks that give us an interesting/fun rotation, and would not fit the "Furious berserker" theme.