That is a lot to go through. Perhaps a quick reply to the following, Graham, so I understand where we connect/disconnect?

The material universe is a result. As such, the foundation of that result cannot be found with that result. The result must have self-based qualities, and therefore not have a collective foundation, but rather be a collective of outcomes that are all self-based and interfering with each other's self-based outcomes to their extents possible.

It also means that the QM level cannot be the same as the GR level; it would not be possible. And we can already see that QM has a charged subatomic reality, whereas the GR reality is neutral in charge for its overall outcome.

Unification is a brain fart. The universe is a result, and unification would deny that.

The spiritual level would be of similar quality. No full unification among all, but self-based realities worth understanding and using as guides.