Depends what you mean by end game, and really communication depends on what job you are and what exactly is needing to be done, I mean, I can be a GEO in Delve without saying a word, in fact, I never say anything when in Delve as GEO, or RDM, or really any job I have went as simply because what I need or what I need to do goes without saying, about the largest communication I have to have in there is 'who Blinded Tute before me? -_- let me know when it wears...' and 'what spells is the other GEO doing?' besides that my communication is fairly low.