In that case, perhaps a portrait of the lieutenant in the post battle debriefing. Maybe on a tile it can say something like "unreported gang activity" instead of "no gang activity" or so, but depends what you plan with those.
On bosses:
Judging by the fixes, the game exception upon launching a boss battle is most probably already resolved.
Just one point: seems gang bosses and main bases can reside on any tile too. The game reports the mafia boss as a lieutenant on the citiscape, so might be related.
On intel:
Higher chance to get the same lvl intel from other gangs means no reason to ask them about their own. So you ask churchers and survivalists about internal goings of Mafia, the mafia boss uncovered through interrogating survivalist lieutenats. It pose the question, if they know so much, why won't do something about their competition themselves.
