I agree with most of the revision, although I have a couple of points to address.
I think Golden Chakravartin could be considered bigger than entire galaxies, but that goes in contradiction with the guide posted.
It says he was sitting at the center of the Milky Way, but how could he do that if he was dozens of times bigger than a single galaxy? We can't accept both things due to such contradiction, Chakravartin is either much bigger than many galaxies or "simply" big enough to sit at the center of one and affect it in a meaningful way.
I think Ryu and Akuma should be High 5-A even in base.
This because they fight an Asura who has access to his Mantra Form, which is achieved only at the end of the game, when he's High 5-A in his base.
Also, on the moon we see
the sheat of Augus' sword, meaning that the battle with the latter has already happened by that time, and base Asura was High 5-A in that battle.
I don't have a real stance of the moon's size. We see it being rather close to Chakravartin, but at the same time we've pretty much accepted that the game doesn't always represent things being the size they're intended to be due to limitations.
For this reason the moon might look closer to Chakravartin than it really is, simply because the game couldn't support showing it so far, and so it appears close to the deity, and then suddenly closer to Asura, who's still a decent distance away from the god.