This was a strategic move to encourage the adoption of then "next-gen" hardware in the West. By focusing solely on the PS4 for the English release, the developers didn't have to worry about localization or technical support for the aging PS3 hardware outside of Japan. Why It Never Came to PC or Xbox

This decision allowed tri-Ace to push certain technical boundaries at the time:

One of the "exclusive" feelings of the game was the lack of transition between exploration and combat.