Taking this bit by bit.

As the ability to represent information about the universe becomes more complex, therefore the expression of the consciousness is more complex.

As externally observed, yes.

Right? If you remove half of someone's brain, they're less complex.

There is no externally verifiable proof of this experience.

When that physical complexity breaks down (entropy or death) the ability of the consciousness to express and perceive information about the universe is similarly broken down, simply because the information representation systems are no longer there. It's simply a matter of physical functionality.

While I don’t agree with your linguistics in principle, I believe I agree with the thrust of your expression.

Just like if there is a society of a hundred million people, and then suddenly 99.9% of them die. The remaining people would not be able to exactly re-create the previous society regardless of how hard they try, simply because the operational functionality does not exist anymore, even though there are still parts of that society still existing and conscious.

This conclusion is actually something of a jump. I get what you are saying and don’t disagree with you entirely. But again. If you’re basing your argument in science, you are making an unproven jump.

Let me relate a story real quick. I used to know be close acquaintances with a brain surgeon. No really I did. And he liked to make fun of people who thought that different waters were different. Brilliant man. Could perform actual brain surgery. Yet refused to acknowledge that perhaps chlorinated water and alkaline water were somehow composed differently.

I think in a similar way, we can see the human body as a democracy of cells. And similarly, cells as a democracy of molecules. The informational complexity of each layer stacks up to build the higher layers.

What’s Democracy?

But our consciousness seems to primarily reside in the highest layer it has access to, as we can't arbitrarily shut of the experience of being a human and experience being a lone cell for a while. We are kind of trapped at the highest level of complexity we can access, in a way.

We very specifically are not. I’d recommend you meditate more. I visit specific parts of my body on a regular basis. Not to be harsh but do you exercise much? Do some yoga? You aren’t at the top if you can’t visit the bottom when you want.

So in that sub-atomic fundamental particles can not be created or destroyed, thus consciousness also cannot be destroyed.

I agree with these statements separately but neither follows from the other.

Only the complexity of expression can be destroyed.

Yes. Agreed 100%.

I think this explanation works for both the "receiver" model as well as the idea of it being inherent within the matter.

Once again, fair. We have slightly different perspectives but still see things very similarly.