Day 85: FotLC through the 113 lenses from The Art of Game Design

Day 85 - Lens 29: The Lens of Secrets
Change who has what information, and you change your game completely. To use this lens, think about who knows what and why.

What is known by the game only?
With new players the contents of the 'Read this if you win' note are secret, but nothing from the main gameplay.

What is known by all players?
The state of paths on the board. The number of citizens remaining in the city. The number of ally tokens that each player has. How many guards each player has placed.

What is known by some or only one player?
The number of guards in your tribe bag. In a challenge, how many guards you have committed and which side of your challenge token is up.

Would changing who knows what information improve my game in some way?
I think that this is a good balance, however knowing those things is dependant on players situational awareness and not all players will know all the knowable things at any given moment. That can make the game seem unfair to less observant players. The skill can be learned and is an important part of the game, but I worry about it ruining the game for new players.