Tell me about it. I played Rebirth on 'shifts' I suppose you could say. I'd watch TV with my girlfriend after our daughters bedtime from 8ish till 10ish, then play Rebirth from 10 until 1 most nights. Excluding the first 5 days post release which I booked off work
Worth it!
With regards to part 3 of the Remake trilogy, interviews with Hamaguchi have pretty much confirmed that the final game will basically be open world, in so far as there is a large map with towns in it, you fly around in the Highwind and land where you want, there will be inaccessible areas initially, secret areas, and so on - just like the classic games, but for the current gen. I'm pretty sure the last game with a proper WORLD map (not open world in FFXV) was Type-0 which was originally released in 2011, and fans have been begging for a return to that ever since.