Congratulations, your article completely hits the mark.

Our universe is completely relational. Nothing has inherent properties, and everything depends on the interactions it has with the rest of elements out there.

As I said in another comment, to exist is to interact. If something doesn't interact with the universe in some way, we can safely say it doesn't really exist.

Physical existence IS the continuous recreation of structure by continuous interaction with other elements, therefore, existence depends on continuous “observation”.

There's no “unobserved” state for anything really existing in the universe. If something really exists physically, it has no other choice than to interact with the universe somehow. It MUST be observed by some other part of the universe to really exist. It may not be observed by a conscious being, but for sure it has to interact at least once with some other element of reality to become real itself.

Conversely, any interaction that has not yet happened is not physically real, and should not be considered. So no superposition of possibilities could be real, not even at the quantum level. Only the factual realization of an interaction (when/if it happens) is real.

And that's why your statement that quantum wavefunctions and Minkowski's spacetimes are just abstractions is totally true. They are the different "brushes" we use to picture reality in a way we can interpret from our place inside the network of relations that comprises reality.