I love mystery games, so--
Love: When mystery games actively draw attention to the idea that you need to draw your own conclusions about what you find in the game, and make your own truth, instead of just following a track
Hate: when the above is expressed as a formalized "Mind Palace" mechanic à la the more recent Sherlock Holmes games. That's just covering the track with a tarp instead of letting you build your own theories. Either let people accuse who they want with the evidence they have (once again I plug Paradise Killer) or acknowledge that there's only one acceptable answer
I will always, always, always go to bat for Parade Killer. I think half my comments on Lemmy have been shilling for it. I desperately want more mystery games like it. Not just for the reasons you described, but because it so, so, SO completely nails the relationship between its aesthetic and its plot question about what it means to have institutional power in a institution that's downright malicious. The player character is explicitly a tool of the evil Syndicate. Is she even interested in effecting change? Could she if she was? Is Paradise worth saving?