Percentages

Personally, the percentages in the Necropolis dungeons completely kill any desire to delve into the details of the setup and plan anything. It's already difficult to account for everything, and with percentages, it becomes completely impossible. It's easier to just choose Necropolis dungeons by flipping a coin and not worry about it. But what's the point of such a game?

I would also remove the immunities for the first night, by the way.

Removing immunities would be a good idea for those who haven't played in a while. But I don't think it should be removed for newcomers and the Game Master. Otherwise, newcomers will be eliminated on the first night because they don't want to harm their own units.