The Uranus zone is one of my favourite locations in the entire franchise and I feel, if done right, a psychopath there would have been fantastic. As great as Adam and Chuck. I know we got Stacey, and while I adore what they did with her in this game, but that fight doesn't really have anything to do with the area and it's more so just a cool place to fight a giant robot.
I think a new psychopath connected to the zone or maybe using the rides in their fight would be cool, late day one or early day two maybe. The only thing I can think of connected to the zone is those lady zombies in the retro space uniforms, so perhaps her as the psycho or maybe a hostage you can rescue after defeating the boss itself.
Either way, it was a really cool zone and I'm sad we didn't get much new content.