@bisonhero: Great point, I forgot to mention the character profiles. I think it was used a lot better in 3, and could have improved 1 but poorly implemented in 2. I did miss it in Apollo Justice. I always think of it more in terms of flavour because I just present profiles to people to get their opinion on a person rather than the times when you need it to progress the story. All of the games suffer from lack of clarity over which evidence the game expects you to present.
It doesn't stand out to me among the usual logical failings though. It's bundled in with all my other frustrations.