I've had this idea for awhile, in the "If I ever design an RPG" bin. If you're presented with a choice that has gameplay implications, you can press a button to have the game explain exactly what you're deciding-- yes even if it spoils something.
If you're asked to decide between two NPCs in a dispute, the optional button would explain "Whoever you pick will join your party".
I'd jokingly call it the Anti-Kawazu button.