(Google Translator)
I do not know Batman game.
However, in TW3 case, it may be necessary for the mechanics and quest progress.
This really is the eternal question - how many mechanics, and how much the player's skill.
The same is the problem of combat in the game. Mechanics, or maybe the player's skill?
If the quest progress will depend on the player's insight, that in the next game, the quest is no point, because we will know the answer.
Do we know the answer, or maybe Geralt knows the answer. How to tell a story if we know the answer?