Step-by-step YouTube videos embedded in the quest journal that describe how to win a fight in a perfect scenario. That way, everyone will have no reason to not know every aspect of a fight beforehand, as it's pretty much a requirement now. Screw communication, that's too hard.

Serious reply, I'd like someone to figure out a way hide quests in our journal. We had it in the beta, but apparently it's impossible to do now.