I'll post this here even though I think the point of the suggestion section is so that DR can ignore every stupid idea for a new roll or something else. Have you thought of making the achievments more in depth? I'm not sure if this is possible on the battlenet editor but it would be really cool. One thing that would be good to know is what roles I have actually won with instead of just things like half town and to add several achievments that don't have to do with winning. Some ideas I have would be:
-double kill: get two kills in one night as an arsonist
-triple kill: get three kills in one night as an arsonist
-multi kill: get four or more kills in one night as an arsonist
-con artist: get put on trial and voted innocent as an evil role (maybe have levels for this one)
-its time to duel: die defending your target as a bodyguard
-pro vigi: take two or more shots as a vigilante and kill only evil roles
-thrown under the bus: make the mafia target a fellow mafia member as a bus driver
-apathetic: win with the mafia or evil role as a survivor
other people feel free to add your own