I'm a junior physicist working with a university in Melbourne, Australia. I'm afraid universal expansion due to dark energy does not function in any way like the mechanism hinted at on this website. Dark energy causes expansion of the universe in every direction at the same rate. This effectively causes a zero net force on any individual body. As such it does not accelerate objects within the universe. Dark energy, a yet undetermined mechanism, is reverse gravity in the sense that the boundaries of the universe are being repelled. It can not, however, replace gravity and is not, and in science a direct claim of incorrect is not used lightly, responsible for the gravitational force applied by the Earth to bodies on its surface. The arguments you raise are vaguely valid but to be honest you don't need to argue, universal acceleration does not work the way it is being portrayed. Most of the science discussed on this site is wrong. The most dangerous inaccuracy occurs in discussions on the bending of light in a vacuum, a purely gravitational phenomena. Do not believe anything on this site, always do your own research and feel free to email me, i will always provide peer reviewed, published supporting evidence for any personally addressed question.