While i can agree Blood weapon could fit a 10-20 min ja now.

Tho imo i feel again the way DRKs say "ooo blood weapon is the worst 2hr in the game ect" just says /emo or i don't know how to use Blood weapon.

Blood weapon is still a really good 2hr infact it's prolly the second strongest in the game still (w/ capped haste)
(strongest in some cases)
And Hundred fist is the most useless 2hr in the game (w/ capped haste)

The issue w/ blood weapon is the duration and need for so many other buffs meaning it's hard to use.

The fix imo would be make Blood weapon have a 30% magic haste component so that DRK can alway be in capped haste w/ it.

Making the duration 60 secs w/ this would go along way.

Also worth mentioning as long as your swinging your pretty much invincible w/ 80% haste BW SE

Summary

Blood weapon should be a 10 min ja

or a 2hr w/ 60 sec duration and 30% magic haste component.