Alright, so
Yes, admittedly, my thought process was more in line with Cal's while making the profile, though not quite the same. I'll try to explain.
Basically, my stance more or less revolves around how it seems we cannot assume that the cosmologies of CStW and the cosmologies of the Cthulhu Mythos proper are similar enough to, for 100% sure, derive the same meaning from "Beyond Angled Space", as within the narrative of CStW itself it is not given any further context at all. Generally, we consider different variations of the same character to require their own feats/world lore in spite of being directly based upon the same thing, concepts such as angular space and dimensionality shouldn't be different.
But wait, isn't the Cthulhu Mythos imminent domain, now? Which should mean everybody can use its cosmology freely, right?!
Well, the problem with that from what I can see is that, if we were to accept "Beyond Angled Space" as being functionally the same as the original Mythos, with utter certainty, and were to carry over its lore, then we would have to accept the rest of the mythology that is inexorably tied to said Beyond Angled Space as well. That's a big part of what defines them as being so beyond all human reasoning, their existing beyond Angled Space... including all the High 1-A/0 Outer Gods/Azathoth. Clearly, this contains a contradiction, as a being can't be Tier 0 if it is poked in the face with a sword and dies. And the other Old Ones/Outer Gods in CStW seem to only demonstrate parity with a 6-C to High 5-A character, which further contradicts this.
So, to err on the side of caution, I prioritized feats that actually happened within the story before going "well yeah, these things might behave similarly to the way that they do in the source material, so it is worth adding to the profile." The following, I believe, is true-
Towards the end of the game, the Narrator points out that by defeating Aza'thoth, thus saving the world. What world? Every world! Granted the context in play, with there being reality-hopping and whatnot, I am inclined to take this to be a Multiversal feat (every universe) rather than a Universe level feat (every planet), even though world had been used in reference to the planet the game takes place on prior to this. This is the 2-B low end.
Then, I remembered the whole "Hounds of Tindalos/the multiverse is infinite" thing, discussed it a bit with Azzy... and even though it was never stated nor implied anywhere within CStW itself, it seems pretty reasonable to assume that this much is very likely the case, as fictions already very often contain infinite-universe multiverses to begin with. It's a common trope that doesn't require a significant leap in logic... so, very likely 2-A.
I guess my hang-up on straight-up saying that Beyond Angled Space has to function the same here is that no concept of dimensionality is ever mentioned, or even implied, really, within CStW itself. All we have to go on within the game itself is a reference to a vaguely defined location that shares a name with what the game developers would understand to be a location within the Cthluhu Mythos...
(Again, an argument based on implication rather than something we can for certain prove: "He defeats Azathoth, who resides "beyond Angled Space"... would imply he existed entirely beyond 4-D space-time")
Mind, I don't deny its very possible. It is oddly specific, and invoking Death of the Author here seems to actually favor upgrading them rather than vice versa, as it denies the argument that "Well, Zeboyd didn't know that setting the fight here might entail that they're so and so powerful." But because the ending isn't well explained (because you know, comedy), yet at the same time the evidence suggesting this higher rating being legit was too weighty to ignore, I went with the safest option and tried to account for a wider range of possible levels of power, rather than assert "this is definitely the right one".
I guess if people are really insistent, they can ignore that, but I definitely feel like it would set a really bad precedent for us as a site, regarding parody characters, to say that we can scale Cthulhu to lore that his work is based off of rather than his own.
...all of this said!
If I simply misinterpreted Azzy when we were discussing Beyond Angled Space's high-end? If it entails existing beyond dimensionality altogether, rather than simply being infinite-dimensional? Then yeah, that definitely warrants upgrading the High 1-B to 1-A, nothing more to that bit.