I think the new interrogation system is quite cool. I think it would be awesome if you could have it as a infinitely repeatable system like the random bounties.
Currently it seems, that after getting the girl you can get via interrogations, you get no more quests from interrogations, so they seem to be finite. Maybe before you get the interrogation leading to the girl the order you get interrogations in is random, but i never got the same interrogation reward twice, so it seems that once you got them all the only use of interrogating people is now to stop the negatives of the secretive trait. I had kinda expected to continue getting random interrogation rewards (drawn from a finite set, so eventually they would repeat). Could even be the same ones as the ones you got before the interrogation leading to the girl.