One thing is for sure, this game leaves a ton of room for mechanical expansion.
- I don't know if there is room in today's attention-deficit world (because seriously, many people don't actually read subtitles) for a game where characters in every different level actually speak different languages. Like, sound design in games is supposed to give you familiar audio cues to indicate what's going on. Imagine if players had to learn six or twelve sets of phrases in different languages to indicate whether someone is becoming suspicious of you or not. The average player would just be in a state of constant confusion.
- Right now, basically no rules apply to NPCs - they're never trespassing, they can bypass all locks, and they can never be in actual conflict with each other. It would compound the game complexity to change up these rules, but I think players are expecting these kinds of changes in future seasons (rather than twelve more levels where everything is basically calm and peaceful by default).
(People keep asking for a prison level. That would be wildly unrealistic under the current game mechanics where any NPC can go through any locked door.)