How many hours can I squeeze out of this game with new game plus and every single thing to do and stats at a casual non-hurry pace?
Do you mean the current demo? Or the full release story mode when it is out?
In Demo: All fights fought is about 10hours. Another 8 for each character in the Cosmic Trials.
The full game will be somewhere over 30hours. Demo has 2 chapters, while the full game has 9 more. There will be no grinding or padding so all of those hours will be unique puzzle, fights and quests.