Pinboard and Cluebook

[abstract wharf]

This is a type of post that's been done to death, but I have an angle on it I feel that's unique. Bring back the Cluebook, and rework the Pinboard functionality.
The Cluebook would essentially be a built in hint system, updating whenever the player would come into contact with a puzzle-related item. The Pinboard, on the other hand, would be a way for the player to visualize the puzzle pieces of the narrative as they progress through it. As the player discovers more about the story and characters, the Pinboard updates to visualize the connections between everything the player has learnt so far.
These updated mechanics go hand in hand with both updating the narrative and bringing back sandbox/immersive-sim type elements to the game, so I would recommend introducing these updated mechanics in updates that correspond with those other features.