Quote from internet: "every subjective phenomenon is essentially connected with a single point of view, and it seems inevitable that an objective, physical theory will abandon that point of view".
That is the hard problem itself: rejection of any subjective point of view. It is relevant, just like Relativity and the Quantum reality, that extraneous explanations of consciousness can only be surmised, not yet be contained in a measure of experimentation.
"An essentially subjective state just IS an essentially non-subjective state (I.E. how and why a felt state is just a functional state).
That's too easy to explain the multifarious adjectives of consciousness. There are too many variations of MIND to limit the "functionality" of personal, subjective experiences. Science is strapped to a table to try and explore the functionalities of the subjective mind an its consequences.
It is obvious that subjectivity, a peculiar point of view truly stumps scientists from equating subjectivity to objectivity, the measurable mind through experimentation. It is still the stone age where mind is concerned. Our physical science, with new technology, has broadened the scope of medicine and psychology, among the whole cast of magnificent technologies to heal and explore the mind factors; in fact too many.
I propose a simple instruction to solve the hard problem: talk to people ABOUT their experiences. In due time a revelation will become apparent and adaptable to solving this dilemma of understanding consciousness in its subjective state. The objective is TO KNOW the point of views of so many individuals, and then calculate the parameters of conscious states of mind.