Sheriff’s a neat role for finding the bad guys. Not as useful as Observer (nothing is, IMO) but excels mid~late game.
Right now though the role feels really linear in what it can do at night, especially when compared to its Marshal counterpart. Sheriff only gets to investigate people whereas Marshall oddly has the useful Snoop skill. I think Snoop would be great for Sheriff to have as well as it’d let Sheriff’s do some fact checking, too. Rather than the linear Investigate: Unseen/Not Suspicious routine.
For Paladin, I don’t believe it makes sense at all for them to be convertible by the Cult. Paladin’s to me are devote and pure; firm believers in what they believe. Yet in ToL? — Easily brainwashed. Eh…
My suggestion for Paladin would be to make them immune to conversion and make them a role the Cult has to burn an Eradicate on to get rid of.