I'm still amazed by all the "If Ultron somehow actually found a way to recreate himself" like its an impossible feat. Vision went and wiped out all ONLINE trace of Ultron. So if he had the foresight to store a version of himself offline he survives. It's not complicated and has been a giant plot hole since Age of Ultron.

There is absolutely no way to condense decades of Batman lore in to a 3 movie arc. I have a decent grasp on all these characters without being a huge comic book nerd (using the term in the most loving way possible) so some of these characters won't have the significance to me that they might to others, but I never felt anybody was wasted, because to build 3 movies, some of them NEEDED to be reduced to plot devices.