This is news to me, about how Growl interacts with Vengeance. I thought Vengeance got made more straightforward for MoP, then I learn about stuff like this.
Widow Venom nerfed? It doesn't work as advertised anyway, having virtually no effect on the target. Now it is entirely useless.
how did you get that result from that hotfix anyway
Nerfed? How is that nerfing? It's just saying that they were stacking and that's NOT intended nor it stays it should. So they are fixing something it was broken.
OK so how about fixing the Wintersgrasp bug?