The Map is Not the Territory crowd - Korzybski and General Semantics practicioners - dealt in depth with just the issues you raise, so much so that they have particular terms for what you're getting at - the Is of Identity, the Is of Predication, and intensional versus extensional statements.

You're plowing the same dirt. I think you should refer to them, and show how you either extend what they did, or depart from what they did.