Perhaps? at it stands 25% of your damage going to a second target at the cost of 20% energy regen is a pure dps loss. Rogues will do more damage with the extra energy flowing in then that 25% would bring. Maybe once were near the end of the tier and regenning 30-40 energy per second with the hugely inflated stats it will be worth taking the regen hit. That fact alone gives me hope that this is some sorta typo. As for the second bit i quoted Blade flurry used to be a cooldown and imo it shoulda stayed as a cooldown. Never did understand why they changed it like they did cause ever since they did theyve balanced combat dps around bladeflurry.
Bottom line there isnt a rogue out there that wont aggree a nerf was needed. But to suggest that a 75% nerf is nothing to moan about is retarded. There isnt one person on here wouldnt be pissed if their favorite class/specs main spell was neutered by 75%.