Ghost of Yotei's use of a different protagonist allows it to introduce an evolution of the Ghost persona, thanks to her story ...

Rukia may promise that afterlife in the Soul Society is peaceful and serene, but the reality of Bleach's afterlife is far darker than it appears.

Ghost of Yotei's Atsu is already setup to be different from Jin in a number of ways, but one of the biggest differences may be her fighting style.