Seems pretty smooth on switch. Did you overclock or stock?I have recorded a 100% characters missions (including extras) playthrough with the graphics mod. It was the update #2 and 1.0.2, since it was recorded a few days ago. I also activated the SSAO and disabled the AA (since it looks really bad with SSAO, and I don't mind a few jaggies).
Yesterday I completed the Playstation 2 version and, even having far more performance issues, it feels 10x better. At least GSS is improving it, which is something that I didn't expect.