I think frame or even multi frame generation combined with Asynchronous Reprojection / Frame Warp might be a very good idea.

https://youtu.be/f8piCZz0p-Y?si=OLq9iZUjuRMYKPDo

If you have never heard of it, the basic idea is that you make low FPS feel responsive in first person games by having the mouse motion warp the existing frame independently of when a new frame is actually rendered.

This could be combined with some AI techniques to help sort out the edge artifacts you get from this.