But why would she want all the Vix dead? They're the good guys!
I sincerely enjoy thinking about Vix as the good guys from The Sundering. Or at least Joran perfectly fits the picture - honourable, unforgiving, self-righteous dick.
Honestly north holds a huge advantage right now. 1/3 more nobles, potentially 1/2 more CS available on short notice. But most importantly with the inclusion of GX nobles north started to finally work cohesively! No more strategic blunders.