Hmm, Importance Of Philosophy never considers itself just a "Cliff notes", but that does not mean you do. I did realize that the website and your opinion were the same.
If the "ethics axiom" is not only self-interest but also civility; non-initiation of force. I might agree on your conclusions from those "ethics-axioms". (But i would still disagree with the ethical premise)
I do disagree with the website, even with the extra premise, though. But some of the effort in that website is admirable. I am thinking of making something like that one day.
You can post the resources if you wish and it is not to much effort. If i get time i will look at them.(or pm you asking them again, if you do not think it is worth it, without my promise of reading them) I myself do not really have resources i could point to you about my own views. That is why i quote and link from outside so little. The upside of that is that i do not quote ambiguous statements and not explain either.