TT mode is a very cool addition to the game and in general it's rather enjoyable, but there are some things that I'd consider overpowered or just out of balance (strictly for TT mode).
1. Retributionist - I feel like retri role is way OP for town in TT. That instantly confirms 2 town roles and when it comes down to finding the TT in a few days, town just has a massive advantage. Retri should either be removed from TT entirely or receive a nerf. Or make retri able to be TT aswell, that would be very interesting.
2. Option to suicide in jail - TT games often get to a point where there's only 1 mafia killing role/witch alive and they are being jailed forever and that makes people want to leave the game to give their teammates a chance, which is a fair play to make IMO. But if the last mafia is given the option to suicide in the jail cell, that would stop them from leaving and have a shot at winning at the same time.