May as well through my idea up for speculation:
The central mechanic is that everyone has second lives and the day cycle is divided into three phases instead of two.
During the morning phase everyone votes to take away the extra life of one player and give it to another player. The players with the most vote in either category will be selected (as opposed to the most voted pairing). If a player requests replacement, both of their bodies are also up for voting, similarly with players who have been absent for over 72 hours. This phase lasts 24 hours without extension.
During this phase out of town guests (people in the replacement queue) may post once offering their candidacy for becoming a part of the town, town may then vote them in by giving them a body to inhabit. If they are taking the primary body of another player they are counted as replacing that player and get their role and win-con. If they only receive a secondary body they are randomly assigned a win-con with weighted chances based on the number of each side that voted for them receiving the body (so if 3 town and 1 mafia voted for them, they would have a 75% chance of being town and 25% chance of being scum).
During the day phase business is as normal: The player voted to be lynched only loses one life. This phase would last 48 hours
The night phase is also fairly normal, players send in their actions etc. This phase lasts 24 hours.
For the basic version the power-roles I have in mind are:
Saboteur- During the night the saboteur may destroy one extra body a player has.
Tracker- Standard version
Doctor- Standard version
Watchman- During the night you may chose to protect a players extra life, if any party would have messed with the body you scare them off
Additional power roles I want to add but aren't part of the basic game:
Body Thief- The thief starts with no extra lives, during the night he may steal an additional life from some player. He wins and is removed from the game if he has three or more extra lives.
Body Hacker- During the night he may select any secondary body to enhance with two of the following:
Telepathy - Gives access to a chat room shared across everyone who has this ability
Empathy - Gives the ability to determine the truth of a statement once per day
Charisma - Gives two additional votes to the player
Internal Battery - Protects the body against saboteurs
Internal Explosives - Grants the ability of a suicidal paranoid gun owner
Aesthetically I'm thinking this works within a cyberpunk theme.
Thoughts?