There are two problems with Peter Wilson's idea:
1) it contains no new physics, so should not reach any conclusions that the current standard model is not already reaching, unless it can show that an error is being made in the standard analysis. No such argument is given.
2) it contains no useful numbers that would merit the conclusions. Despite prompting by Nereid, the response has only been to quantify the expansion as "very slow". What does that tell you? It takes an unbelievably small energy to rip apart a helium nucleus. Would you then care to rip apart one right now? The point is, the magnitude of numbers is not what matters, it is the comparison between numbers, or equivalently, the magnitude of ratios of numbers. What comparisons are offered in this analysis that could be used to judge whether expansion is "fast" or "slow"? The idea is not at all a bad idea. In fact, it's so good of an idea that it has already been included in the standard theory. Its impact, however, is negligible in the grand scheme-- photons are playing no currently important role in the dynamics of the universe for the last few billion years. This is all well understood, there are no new ideas being presented here, all that is happening is calculations are being suggested that have already been done. Been there, done that.