There's indeed still a lot to do and even more possibilities iwth this game. But I also feel like KST needs a breath of fresh air and a new project is also full of opportunities to make something from all the experience aquired making TT.
Better models, smoother gameplay, amaybe something less ambitious but more focused and exciting etc.
OFC there will be a long wait until there will be enough playable content for it to be enjoyable, but I'm looking forward to it, starting to get a little used to TT now.
You can only add so much new characters and houses, you'll ultimately ending grinding the same kind of events, and creting more cross-paths and having problems to resolve. I guess it starts to be boring to develop.