Sorry to see you go Cyan, and Scar maybe you could go against Gisk since it seems that Avan isn't responding. If not someone can always face my character Ambrose. Eventually down the line I may accept some new characters, but for now we'll keep the ones we have, especially since a story important character will be joining the team. As for the people who have dropped out, they can be simply written off as recruits who left, whether because they couldn't handle it or they had personal reasons. Sanctum would naturally keep tabs on these people to ensure that they weren't spreading around the very limited knowledge of Sanctum that they had (which could be the way that a character would be brought back in if someone returned).