I'm really flattered! Rather than dedication to upgrade and downgrade, I think that I like to study fiction in general, and since I like 40k very much, the desire to study it is just as large. To be honest, while I understand the appeal of great showings of power and I do like seeing them, I overall couldn't care less how a franchise is rated, me liking it or not. I just like to register stuff.
Yup, it'd be really difficult to post everything in a very big blog. Very impractical, even. I'm uploading the feats mostly in another wiki of mine, over the course of several blog posts dedicated to each series within 40k (One for the daemon codexes, one for the Blood Angels saga, etc.), and from there, I can more easily index the feats.
So, for now, my plan would be to simply solve the less controversial stuff first. The Adeptus Astartes page needs a big upgrade to the abilities, there are several ones that are missing, even some that the very profile acknowledges existing in the special techniques section. I'd prefer to separate the weapons in a different abilities key to the rest of the profile, but that's my personal preference. The Primarchs and the Emperor also need additions or at least explanations for several of their abilities.
After that, I plan to carefully structure a very thoroughly explained blog. I dislike having to make a big blog, not only due to the hassles of actually writing something very big and detailed, which I tend to lose myself, but I also dislike making simply a big blog and bog down people with information. In any case, my idea would be to do something similar to a massive 40k downgrade, although that isn't the right word, and really, it is more of a suggestion about how to analyse the entire universe that I believe is better than the system used here.
I've noticed a certain theme in 40k that, while not explicitly or even directly implied to be the case, has a lot of circumstantial and plot-wise evidence to that. The idea is the difference between material and immaterial, or supernatural, power. A being can be, say, Mountain level against material attacks, and Solar System level against immaterial attacks, and vice-versa, although the opposite is quite rare. As material, I refer the what the Matterium encompasses; pure technology, physique, biology and the occasional power that has a biological factor to it, like the sound attacks of the alien race fought by the Emperor's Children in Fulgrim. As immaterial, I refer to everything supernatural, mostly the Warp, but the rare occasional external supernatural force (Such as the Tyranid Hive Mind, which operates within the Warp but existed even outside the Milky Way and follows some different rules). While often there aren't clear borders between the two, like eldar technology that borrows from both and Warp mutations that boost one's pure physique even without further empowering, in general, it is entirely possible to have great resistance and AP in one, but being very low in the other.
There are several anedoctal evidences to what I'm saying that I'd need to properly structure, but it also explains so many of the contradictions. Primarchs are usually treated to be something around Mountain level (Multi-Continental if you interpret the macro-cannons feats in the way that is currently applied), with Horus being surprised that a Chaos-empowered Lorgar survived direct hits from a plasma cannon of a Titan (And Lorgar was very damaged by it), the Forces of Chaos often being able to cause cosmic levels of warping and destruction, yet valuing a lot artifacts and vehicles capable of causing planetary and stellar destruction.
I could go on and on providing several examples, seeming contradictions, but as a point, just notice on how a great majority of cosmic feats are performed because of the Warp. Notice how it is consistent that a psyker can destroy a whole Titan with a snap, but at the same time, people that can tank much more serious, purely destructive Warp attacks from the same person often die to much simpler things than said Titan (Using again the Primarchs as an example, Magnus atomized a Titan with a gesture, and he used much more energy, in a much more directed and destructive way, to Leman, who tanked it with no problems. Yet, Lorgar, who has also fought with Leman, wounding him and tanking his attacks, still was very grievously wounded by a few shots from a Titan). Also, notice that when a cosmic feat is performed purely out of technology, such as is with the necrons, people treat such feats as utterly terrifying.
If my CRT passes, most beings in 40k will need to have something like "X level, Y level against the supernatural". It isn't easy, and again, there are many times that such borders aren't clear-cut, and many others that we need to consider that such attacks are almost impossible to scale (Such as indirect harm caused by Warp; someone hurling telekinectically a heavy weight, cracking the planet under you, all of that. I'm of the opinion that those scale partially to both physical and supernatural damage, but how much, impossible to determine), but the thing is that, as hard as scaling may prove to be that way, it is much safer than just dismissing consistent showings as "anti-feats" or "feats" arbitrarily. Particularly, Macharius makes absolutely no sense in the Small Planet level.
Sorry for the roundabout explanation, I'm not really good at explaining stuff in english.