This is about the story of Twixt.
https://www.nola.com/news/article_9c...cf7b71fb4.html
I the gist is this: PVP in City of Heroes was played by "pros", and no one else. Specifically because they could talk to each other. Twixt proved it, by roleplaying as a hero who specifically wanted to kill villains in PVP zones. Zones where people would do the objectives and generally avoid conflict. Villains called him out in General chat, and Heroes took the side of the "victims" (see: the enemy.)
WoW's language barrier significantly improves the PVP experience in the open world and should not be lifted any more than it already is. There's a potion to speak Common and Orcish in /say and /yell, but general chat is still faction-specific. Guild chat is still faction-specific.
Right now, if you kill someone "unfairly" in the open world, their recourse is to retaliate and call for aid. Which just means more PVP happens. If general chat were open to both factions, I'm convinced that any aggressors would simply be bullied out of PVP by whiners. Either that or theyd start tossing insults at each other and just generally create the toxic environment that City of Heroes PVP zones had.
I just, don't know how they can possibly add cross-faction raiding without allowing cross-faction communication as the default, instead of a close-range opt-in feature. And that scares me a bit. Maybe just limit it to LFD and LFR? Guilds should certainly never have orcs and humans together. Open world objectives should never rely on cooperation with the enemy.