A systematic RPG implies work for a group of posters, which few people are usually actually willing to do. For example, a lot of game structure didn't run very smoothly after Shaitan left in DG2.
I'd like to see an RPG with one manager for the storyline to encourage some conflict, to decide battles for the sake of the story, to add some NPCs for interest, and to summarize the storyline to get more people involved.