I haven't tested on PS5 beyond the initial level, but at this point the framerate feels like a solid 60 to me. Just going by feel, I don't notice any drops.
It's really nice to have this -- I held off on the original, stopping a couple hours in, because I just didn't want to keep going at 30 fps.
My only real note is about the dual sense features. All of it just feels really out of place to me. Every little thing makes the controller jab me -- Walking over a tin can on the ground will produce a sharp jolt. The trigger resistance thingy on stoneform is neat, I guess, but I honestly would rather go without it. I guess it works as a novelty but for me it makes the controls feel less precise.