1) Why not add it to the interface? Because it's a bad idea. The game cannot read your mind and know "that book I picked up and read, I wasn't actually paying attention when I did that", nor is it obligated to do that.
If you don't want to read a book then and there, why pick it up? If you don't want to read the book in your inventory, why open it? Not to mention that the very prompt for the dialogue outright TELLS YOU what the book said, in case you forgot or were not paying attention! "Preposterous, who jumps off a cliff just because a statue told them to?"
That's exactly what the book said, and if you can't pay attention to a situation from literally 5 seconds earlier, that's your own problem.
3) I suppose I'm not in disagreement with point 3 too much. More quest options are good, sure. But the co-operative dialogue about whether it was foolish to jump from a cliff is not the spot to add in unrelated quest hooks.
5) Your choices are not unrelated to the consequences; they ARE the consequence.
Each and every choice you make has the consequence of increasing one personality stat a little bit. You are the one determining who you are with each choice. What you seem to be asking for is the option to change history, unsay things that you said. Nothing is stopping you from saving often and reloading later if you don't like what happens, but adding an "Undo History" button to the game goes against the entire concept of a game built around Choice and Consequence.
Decision... Consequence...Besides, how is the game supposed to know that at some random point, it should provide you with a "Rescind all your decisions and roll back your profile?" option?
Nothing is stopping you from having a "crisis of faith" at any time. In fact, the game encourages that because it has many different spots for these dialogues to happen. But just like in reality, you can't just undo everything you've already done, you have to start down your new path from NOW, carrying the weight of all your previous choices with you.
