Hi guys!
On the hider thing:
Pros: If the hider dies because he hides behind mafia, a lot of the time in a normal situation, we wouldn't know which person the hider hid behind. Now we know.
Cons: The chances of a two-kill night increase, especially after night1. The mafia immediately gain information about who they should target N1 (for example, it's unlikely that they will target someone hiding behind them. Or maybe they would. But they do get information that allows them to further aim their kill.) The other thing is, after N1 when any player hiding behind a mafia member turns up alive, the mafia immediately know that all of those players are not the hider. So each night, this plan gets much, much worse as the mafia get more information.
If the hider doesn't hit scum, which is fairly likely, scum have a list of players they can safely target to kill for the next few nights. Part of the utility of hider is that it has the possibility of causing a no-lynch. This utility decreases from the plan, because the mafia gets a list of targets who they know are not hiders. But, the hider gets the utility of being able to "report" who killed them, so that trade-off may be worth it.
This plan also gets worse and worse as the days go on. Night1, the mafia have no idea who is a hider or who isn't, so they don't have any more chance of hitting the hidee then they would normally. But Night2, they do know some players who can't be the hiders, so they have more a of chance of successfully hitting the hidee.