To your questions:
- The saboteur can scout buildings. More specifically, he can scout any unscouted district anywhere on the map, and in doing so he'll reveal the location of the primary building in that district. (He doesn't scout street tiles.)
- Re: gang health -- definitely not a newbie trap! :) -- I frequently boost my gang's health in order to prevent him from being one-shotted by an enemy gang or thief. That said, thugs are a bit overpowered right now. In an upcoming patch, their starting health will be reduced to 1.
- Totally agree that the Strangefellows Level 2 is a bit underpowered. In the forthcoming patch, it will be modified so that it gives all Gangs AND Thugs +1 health -- and this will apply to existing gangs and thugs as well as newly-spawned ones.
- Re: friends list - probably not at launch, as it's a fairly big undertaking and I'm hoping that e.g. the Steam Friends List can carry us some of the way there. That said, the longevity of the multiplayer component is hugely important to me -- it's why I created the game. We'll be adding leaderboards, stats, and whatnot for sure; and if there's lots of demand for a friends list, we will look into that as well!