what about ladders ?

each player holds a position on a ladder, lower players can challenge higher players, they have to accept (or drop a bit on the ladder) ... the outcome of the game (if accepted) calculates the new ladder position for both players

it would introduce a new system next to the bkr .. and i am not sure if fencer likes this ... but it sounds interesting

in active players would drop because they dont accept the challenges

of course this will be tough for the top player because he will receive a lot of challenges which he might not be able to accept (because a person can only play a limited amount of games during a certain time)