There continue to be calls for a smaller game. WHile i understand that those suggesting it are trying to help get a game started, the fact is that this is a terrible idea. The thing that makes bourse special is that the game has 15 players, all of whom may compete until the game is over regardless of eliminations on the board. The board play influences the bourse results, and the bourse results influence the action on the board. This allows eliminated players on the board something to play for since the real victory is in the bourse victory points. This dynamic is possible because there are 15 players, and a diverse set of perspectives, angles, and strategies in play. In bourse Diplomacy board alliance might be two or three nations, but economic alliances vary from two to seven or eight, and shift with each season. You're not going to get this with five or seven players.
Now if players are interested in a experimental/educational game, maybe a smaller map might be a good idea. From what e have seen in the past couple of bourse games is that the learning curve for new players is so steep that they loose interest quickly, and quit playing. However the real issue with players struggling to pick up bourse is that it require two or three times as much communication as a regular game. VDiplomacy is full of players who prefer one sentence messages, and that's just not good enough for a bourse game. It's a complex variant that requires significant board and spreadsheet analysis. It's not something that you can just belt out in 5 minutes each turn.