Not much to read into this tbh, it doesnt necessarily say its gonna be "smaller", whatever that means. Smaller in scale perhaps? to speed up the process of making the game. I want to assume that for the open world aspect they'd take a different approach than what they did in part 1, by which I mean not linear and not divided into chapters. Works very well for the story-driven part 1, but a more open world exploration would be a better take for future parts IMO. But then it wouldnt be "smaller". Wouldnt mind if they change the playable characters or the main story more dramatically either.