Ok, my current thoughts on a few things:
1) Deadman bomb will still kill two people after a lynch (the person who votes last and a random person). At night, it kills only the person who kills the alien with the bomb, but the kill cannot be protected against.
2) Protector will be renamed Guardian to avoid confusion between it and other roles with Protect as a goal.
3) I'll split Bodyguard up into 3 different variants. A given side will only have 1 bodyguard total. (Max)
A: Can protect against any number of kills in a given night against his target, however, he dies at the end of the night.
B: Can determine who the attacker is. He relays this information to the person he is protecting right before he dies.
C: Kills the attacker, but still dies afterwards.
4) Ghost will be split into 3 varients. A game can only have 1 ghost. (Max)
Ghost: Can speak but gets no vote. Town-aligned
Twisted Spirit: Can speak but gets no vote. Dopp-aligned
Silent Specter: Can vote but not speak (including PMs). Town-aligned
There will be no way to determine what alignment a ghost has. I think that'll stop the ghost from being overpowered, since there won't be any way to confirm that the ghost is on your side.
5) Disciple of Truth will be revamped. Instead of role-flipping to everyone, the Disciple of Truth will simple be able to determine someone's Race and Role once during the game (day phase). I think the ability is pretty cool anyway, since you normally can't determine what's going on with someone who's about to be lynched. Town or Dopp.
How does all of that sound?