I don't like it. The name is terrible for starters (although it could just be temporary) and I don't think poison procs are reliable enough for all three specs to keep it rolling on 3 targets consistently.
I'm just not a fan of any ability that encourages multi-dotting or one that relies on it for maximum dps output. I was hoping we'd see the end of that with WoD, but I guess not.
I've grown so tired of the "tab, rupture, tab, rupture, tab, rupture" playstyle of the past 2 expansions; all of these council-type encounters they've been designing with multiple adds, I just find it very annoying and counterintuitive of the class.
If I wanted to multi-dot, I would have rolled a dot class to begin with, or at least a class that could easily tab/switch targets from 40 yrds away without having to chase anything down.