On the one hand, great way of bridging the debilitating gap that’s between the Horde and Alliance in endgame/instanced content.
On the other my gut instinct in every instanced content will still be to target and obliterate every Horde member that shows up. I kind of wish there was a toggle to show the enemy faction players as their Alliance counterparts (eg. like in BoD), but that will never happen.
It also shows that whatever spaghetti code they keep referencing when such features were requested is actually workable. This is just another "Losing subs, time to break the “Thing everyone but a vocal minority has wanted for a decade” jar they kept under wraps.
However, here’s me hoping that we get crossfaction communication as a toggle instead of a gold sink, bit more leeway with race-class restrictions and some bloody Dark Iron customization options.