>I’d posit that if our planet was to significantly change is rotation speed that we would all sense it.

Can you feel the fact that in the sun's reference frame, your rotation speed around the sun is constantly changing? For about half the day, the earth is rotating in the same direction as the earth's orbit around the sun, adding to the speed, whereas for the other half of the day, the earth is rotating opposite the direction of the orbit, subtracting from the speed.