Thomas Shey
Legend
I do not think there's a mediocre referee problem. I think there's an undue burden because we put it on referees to align players' informal expectations into a cohesive game. That rather than seeking alignment of everyone's natural desires the easiest way to reach alignment at the table is for us all to adapt the aims we establish together. Just like when we play board games.
That when we align, either to a game concept we agree on as a group, or take on the concept of a designed game things go more smoothly because we are all rowing together and know what to expect of one another. Formal expectations as much about our fellow players as they are about the GM. To get what we need from the play experience we often need things from each other. There's no shame in admitting that.
These formal expectations need not come from game texts. My own group establishes these through active dialog as much as game texts. We also do custom design for our games to make sure that mechanics and practices form a cohesive whole.
I think there's something to this, but its also good to understand that people are often really bad at expressing expectations. That's one reason I think choice of rules system can help considerably here (at least for people who are paying attention to the rule system at all); it can't set all the expectations, but it can tell you a lot of them up-front without some of the stressors with being overt about what you want (even if you can express it at all, which some people are just bad at).
Of course there's no assurance that the available games (in terms of both rules and campaign focus) will, in fact, fulfill everyone's wants there.