Thing for me is I got to the endgame and quit. Had intended to go back to it but kept putting it off and then the Switch port got announced and I got lured in by the promise of shiny new content. And while the stuff for the middle of the game really wasn't all that much it still added some more time with the characters and that really draws me in some more.
Looking it up though, that was the only additional scenarios added. There are a few more options for things here and there and the addition of the Tickington missions so there is at least a few more hours worth of content.