Skype might be available at some point on the PS4 so you might have an option there. But overall, I'd just get a cheap laptop to talk to friends. Although wow does support an in game voice chat, it's quality is complete garbage. Most people I played with used better a voip options.

Can't say I'm for individual limit breaks, I like the current group design of them now but class specific LBs instead of role specific does sound nice.