A little while ago, I discussed Beyond Dimensional Physiology with @Ogtea. During this, I finally managed to figure out how to explain my thoughts on the power, why I don't think it is an Omnipotence Derivative and why it shouldn't possess many of the powers it does.
I can kind of agree with it being Nigh-Omnipotent, but not Omnipotent, at least not explicitly on here. I think the main issue is the lack of a definitive scope of the power - depending on the verse, everything could be encompassed by dimensionality, in which case the user would be considered beyond everything and virtually omnipotent, or dimensionality might not encompass everything, in which case the user's power (despite still being boundless compared to anything bound by dimensionality) could easily be less than some other Beyond-Dimensional existence.
So in essence, because Beyond-Dimensional Physiology is defined as the power to "be an entity beyond all dimensionalities", it's power is relative to what dimensionality actually encompasses. This means it isn't even absolute, let alone an Omnipotence Derivative. Compare this to Omnilock, which is defined as the power to "exist outside of everything". 'Everything' isn't a relative term - everything is everything, encompassing all dimensionality, all fiction, all reality, all powers, logic, limitations, beings, etc. This makes Omnilock an absolute power, as its capabilities aren't relative to anything - you can say that dimensionality doesn't encompass everything, but you can't exactly say that everything doesn't encompass everything.
To illustrate this, consider the interaction of these powers with a different absolute power. Whenever two absolute powers collide, it is almost always impossible to tell which comes out on top, as the definitions of each power should mean that they do, thus resulting in an 'absolute contradiction', so to speak (the only real exceptions to this are explicitly Omnipotent powers, such as Autopotence, Almighty Magic/Science/Mind, etc, all of which are defined as omnipotent in nature). Let's consider Absolute Erasure being used on a user of each of these powers; Absolute Erasure is defined as the power to "completely erase anything/everything on any/all levels".
First, Absolute Erasure against Omnilock. Omnilock, by definition, exists outside of absolutely everything, meaning it should exist outside of the scope of Absolute Erasure. However, Absolute Erasure, by definition, can erase absolutely anything, meaning it has no limit to its scope of reach. Thus, the two powers contradict each other - an 'absolute contradiction' - and it is essentially impossible to tell which would come out on top, if either. On the other hand, considering Absolute Erasure against Beyond-Dimensional Physiology, there is nothing about being 'beyond all dimensionalities' that would prevent the user from being erased by a power that, by definition, can erase absolutely anything completely. There is no contradiction, as Beyond-Dimensional Physiology is not absolute.
Also consider Almighty Laws. These are laws that, by definition, apply to absolutely everything and are completely unbreakable and unbendable. With Omnilock, they exist outside of absolutely everything, do they should exist outside the reach of Almighty Laws and thus be unbound by then, but this contradicts the definition of Almighty Laws, so we can't really say what the outcome would be. However, with Beyond Dimensional Physiology, there is nothing about being beyond all dimensionality that would suggest you are beyond laws that apply to everything.
Linked here is @Ogtea's post discussing possible changes to the power.
