I see no word "Ether" in your post. LIGO (which is basically Michelson–Morley experiment at much higher scale and precision) already demonstrated waves in Ether

I see no word "Ether" in your post. LIGO (which is basically Michelson–Morley experiment at much higher scale and precision) already demonstrated waves in Ether/QF(Quantum Field)/PV(Physical Vacuum)/Space caused by merges of black holes, so I see no point to play this word game anymore. I'm unsure about why you think that laws of conservation will not hold for Ether, AKA Quantum Field, AKA physical vacuum. If we will be able to get energy from QF, QF will lost that energy and will cool down, so Casimir effect will be smaller until it will vanish. However, there is no shortage of PV in space, and Sun is pretty good at heating it. However, because of wave-particle duality, and because waves are propagating without moving, and because waves are propagating at speed of light, Casimir effect may be unaffected by rotation even when exposed to raw vacuum for speed less than 50% of speed of light.