if were gonna do assist kills it shouldn't be based on distance to player it should be based on contributed damage. which i think is somthing that defintely be added to the game.
maybe award a small amount of fortress points to players that are in the area of a flag kill or something. ive always thought fortress points should be fleshed out more like each little thing you do promotes so pick up a flag kill somone defend the flag etc... i don't think the current number system we have is very interesting either tbh to man 0000 id like to see it so you get more interesting numbers instead of just round numbers with lots of zeros at the end. (so i could get a total of some 8357 instead of 10,100. (im pretty sure fortress points haven't been changed much but i could be wrong.
assuming fortress points haven't been changed from what they have been. if i could see get a list on what you earn fortress points for already i could expand on that and tweak the points in a way that i feel would be more interesting.
that would also allow others to tweak it and maybe between a few of us could put together a better system. (im not talking about adding rewards for them or such nonsense. :P)