The amount of talented artists that seemingly get scammed by programmers into multi-year content delays is too damn high. I get it, their initial code is probably garbage but guess what, it existed and it did something. Who cares how clean and scalable and *insert latest coding fad here* if the code doesn't exist. There's maaaaany games that have absolutely garbage code but no one is complaining because they're playing the game. Celeste is a great example(from an organizational perspective). Great game, great mechanics, 5k line classes though. But no one cares.
Let your sequel be where you implement the lessons you've learned from a system architecture POV.
Summertime Saga, What a Legend, Life in Woodchester, HHG, the list goes on, all stuck behind refactoring projects and programmers who probably have half a youtube tutorials experience behind them and think SOLID and clean code are commandments. I'll take bug riddled games over literally nothing any day of the week.