This bit is kind of interesting. Were I a village medic there's no way that I would protect a random on day two. So, to me, that looks like the work of someone on the baddy side. However I recognise that people don't always think in the same way as I do and that a lot of people don't like to leave a power without using it. So I'm interested in what other people think.
Point 2 of interestingness. Do we automatically not vote for someone we know is a duke because we know that they could shift the vote? I'm kind of thinking that we vote for the person we're most suspicious of and see how they react if they are a duke. If a bad guy knows he's going to be day killed the next day then he's likely to duke the vote anyway, just to mess around with the village.