Last few years I’ve been excitedly waiting for sequels from several small-to-medium sized studios that made highly acclaimed original games—I’m talking about Cities: Skylines, Kerbal Space Program, Planet Coaster, Frostpunk, etc.—yet each sequel was very poorly received to the point I wasn’t willing to risk my money buying it. Why do you think this happens when these developers already had a winning formula?
Not just making the same mistakes, they were told to scrap years of development and reuse the exact same codebase of KSP1. They had to start over the project with a decade plus of technical debt from a team they weren't allowed to talk to.