took both sides apart. cleaned them again, took off some of the pad so it was "flat" again, incase it has molded to the old rotors.

with the pads off, and the sliders tighted down, I verfied I could move the calipers without any binding.

They are better, but about the same as the old set.

I think I have some other issue. If a master can give partial braking without moving further, or it could just be as simple as a bad booster again.

I cannot push hard enough to lock up the brakes, or get it to grab harder.
I literally was standing with both feet on the pedal and the car was still moving.
I think this is unrelated to the new rotor swap, as it did this before and I thought this might sort it out. but it didn't.