RenCutypoison on 14 March 2017
All the devlopment post release has probably been slowed, compared to pre-release. They are definitely not using the full development team on the updates. So it wouldn't have taken a full year, by far.
However they also used feedback to improve the game, which is not possible pre-release, not on the full game and on a wide scale at least.
It will however influence a lot on their future games, especially mainline FF titles. This was their first game of this scale and they learned a lot from it.
