By the time it comes to other systems, it might actually be a complete game. Took FFXV three years to be completed(still didn't get all promised content though), with YoshiP at the helm for this, will say it takes half that time. If this actually comes out in 2021(doubt), game will be worth playing come sometime in 2023.
That's if it even feels like an FF by the time it's out, so far with no party members in sight and a drab feeling to the the world/setting, not feeling it. Even FFXII felt like a fantasy setting in it's trailers despite having a more serious minded plot.