The interesting thing about putting things out into the world is that people feel compelled to have an opinion. The fact of the matter is that this only exists because it's something that I feel motivated to write about. I am under no contractual obligation to produce anything, so that it exists at all is the result of a labor of love. You're probably right that there is nothing ground-breaking here and that the same information is available elsewhere, but where? Two dozen blog posts here, a few dozen Usenet posts there, a few books over here and a few papers over there. The value that I'm attempting to bring is through curation -- value to myself and as a side-effect others. The information is free foremost and is created on my free time.
As an author I have very little control over my readers' expectations or desires. The topics that you list are definitely interesting, so I hope to see you one day write about them on your blog (which I like BTW). I think that if this newsletter does not meet your expectations then maybe you will not like future installments. I appreciate your constructive criticism, but if I am to write a newsletter then I should stand true to the topics and styles that I would like to read and hope there are others who feel the same.
Thanks for reading.