Maybe this has been said before, but I couldn't find it.
When morphing flurry into Rapid Strikes, as soon as I hit an enemy and my hands turn "white" granting the bonus to attack speed, I actually notice my attack speed decreases instead.
I'm a lvl 37 NB with Rapid Strikes IV and it is very noticeable. It's really hurting my playstyle right now. As well, Rapid Strikes seems to only activate if you make the final hit, but that could be purposeful.
I REALLY hope this gets fixed in the next patch, because it's hurting my playstyle right now.