I don't know how much of it is "cheaping out" so much as it's pushing the limits of the amount of CGI you can fit in a movie. I guess that could still be considered cheaping out. But most movies just keep a real-world setting and edit in or out parts of a scene. Looks especially dumb when you have things happening that make no sense physically, like super heroes jumping too high or falling too hard. Or materials and construction that doesn't exist in real life. But it does seem like a lot of the CGI is pretty "muddy" looking.