It is a very interesting idea that cosmologist were wrong to ignore electromagnetic forces when most of the matter in early universe were plasma.

On the other hand the notion of evolution implies the existence of global time ordering. Yet black holes makes this impossible. So I am very skeptical about any theory that tries to bring the notion of evolution to the universe.

Also the notion that there can be another universe with different physical constants is even worse than the ever changing notion of dark matter. At least the latter gives a plausible mechanism about why that matter does not interact with normal matter while the notion of changing constants does not even attempt to provide a mechanism.