I agree with most of this. The only reason for using the word morality is when talking to someone who does not realize that "Whatever you want." is the only answer that really can be given to the question of "What should I do next?". (Does that sentence make sense?)

The main thing I have to add to this is what Eliezer describes here. The causal 'reason' that I want people to be happy is because of the desires in my brain, but the motivational 'reason' is because happiness matches {happiness + survival + justice + individuality + ...}, which sounds stupid, but that is how I make decisions; I look for what best matches against that pattern. These two reasons are important to distinguish - "If neutrinos make me believe '2 + 3 = 6', then 2 + 3 = 5". Here, people use that world 'morality' to describe an idealized version of their decision processes rather than to describe the desires embodied in their brain in order to emphasize that point, and also because of the large number of people that find this pseudo-equivalence nonobvious.