I would like to keep the 2D gameplay as an option like bonus stages or something, I also planned to have classic touhou shmup segments as a sort of hacking minigame. In the end it all depends on how much I can afford to work on the game, polishing the 3D version is requiring a lot of my energy and fixing the legacy 2D is the lowest of the lowest priorities at the moment, but I'm definitely not taking it out of the codebase