Now that I've gone through and unlocked everything... The Gallery is missing a few things, though I suspect it'll be in future updates (Mal0 gallery is incomplete).
A small request I have would be an expansion of the facility. Maybe add a large room like a gymnasium that can hold several characters and changing rooms that can hold two or three, that way Peaceful Mode can host all characters without having to kick out or kill others. Just a suggestion off of the top of my head.