I don’t think this is a brilliant idea, but I do think a log on each of the main characters in your party, the ones given personality by the storyline, would be fun. I’d like to see an image of each (as depicted in the cutaway sequences) on a page in a book, and opposite it, the number of kills each has made, the specific kinds of kills, the number of times their link has been severed in battle, etc, along with a statement of their current equipment.
Just a thought. These characters feel so real; and having that information not only serves a touchy-feely purpose. It also provides hints to given strengths and weaknesses.