Tried these with a SWF bard/rgr with Maxed SWF over the weekend pretty fun, a little spammy to keep them ticking over but pretty fun. Also used a dwarf shield build, and a BF THF build. The SWF seemed to get the most out of it.

Dance of death at rank 3 is nice now if you keep it up, but not quite good enough that I would want to give up any other tier 5 trees. But at tier 4 the growing storm is the balls now, finally something in the tempest tree that is nasty. The changed cool downs on these two make the unchanged cooldowns on elaborate parry and thousand cuts pretty hard to play with.

Would be interested in other people's experience with this.

Not really worth it, I screwed with it after I heard about the bug, it even works with ranged or thrown if you switch after first shot. But really nothing compared to more recent additions.