It would be nice to have an area that explains OGS features, like game scoring, ranking, etc.
An example: I am currently following a thread where people are arguing about the impact of timeout on ranking. The “funny” part of this heated discussion is that there is no reference that clearly explains how the ranking system currently counts timeouts.
Another common rant is about incorrect group status when scoring, in particular in correspondence games. Here too I believe that a minimum of documentation would help clear some misunderstanding.