Well, it doesn't have any more of a conservation of energy issue than the current theory already does. Loosely speaking, cosmology currently states that the ac

Well, it doesn't have any more of a conservation of energy issue than the current theory already does. Loosely speaking, cosmology currently states that the acceleration of the galaxies away from each other comes from dark energy. However, if we don't use that dark energy for pushing the galaxies around, we should have enough left over to increase the rest mass of every particle in the universe. Neither theory has a good explanation as to what this dark energy is, but both theories have it.