Also this part specifically irks me.
"Characters who lack spatiotemporal features entirely, while not actually being superior to them in nature. They are simply ontologically different from any dimensional construct, but can ultimately still be comparable to dimension-bound entities in terms of raw power."
You may ask where this is from, this is actually from the BDE Type 1 section. The statement you gave, lacking spatiotemporal features as your own statement states, is just BDE Type 1 at best. This also explains the extensive evidence you gave for its acausal nature, from the very next part of the section:
"Due to being aspatial and atemporal, they are obviously immune to conventional Spatial Manipulation and Time Manipulation, and since they are not part of the spacetime continuum, they usually have Acausality"
As I said, acausality doesn't help your case here anyway and is explained away by this.
Now, onto BDE Type 2 itself. Here's what the section starts with:
"Characters who exceed dimensionality, which may occur in the following ways"
As you can probably infer by yourself, lacking something is patently NOT the same as exceeding it or being entirely superior to it.
We can forget the first way to achieve it via a Von Neumann universe since that's not what you're arguing and focus on the second part instead.
"Through a qualitative superiority over lesser things, which is to say: Ontologically surpassing all the contents of a lower reality, and being above their physical composition and differentiation. Characters of this nature don't simply lack all physicality and composition (As in Type 1), but surpass it altogether, being of a wholly superior nature that is not reachable by lower states of existence."
This is the part where you haven't done the work unfortunately, especially given the sheer lack of relevant scans to support this. This claim of mine (of proving superiority to all of space-time, etc) isn't out of thin air as the very next section would show:
"As a default, statements of being "above dimensions" are set at Low 1-A, and the same is applied to statements indicating superiority over "All of space and time," and similar."
And there it is.... the exact thing you
haven't done here. Not only do I see no statement of being "above all dimensions" (in this context, all mathematical dimensions and such, so no the Tau Star System alone isn't enough proof), you have also NOT posted a statement or proven anything that indicates being above "All of space and time" like the standard itself states. So yeah, this is why your "direct" statements aren't enough for me, because they simply don't follow the standard that you claim they do
Also, thinking more on it. There's actually not even a single statement of the Cauldron itself either transcending all of space time or being above all dimensions. you just stated that it does simply because it created the star seed for the Tau Star System and the crystal that supposedly transcends space-time, no evidence of such a statement for the realm itself among other things. Are you sure this isn't just a verse-specific creation mechanic, because that's exactly what it looks like to me especially given the size problems that are already an anti-feat on their own.