A “Bloodthirsty” advantage that grants morale for kills.
A character creation method that removes advantage and disadvantage limits as a midpoint between single-pool and freeform, allowing players to try out some more insane builds while still operating under a point limit.
Using a cash card on an arcade machine to play the sokoban/snake/robotfindskitten minigames.
What minor ideas do you guys have? By “minor” I mean features that you do not think would significantly effect the game balance of most games, or else is optional, and which you think would be relatively simple to implement.