I just think it is human nature to keep reading authors one likes. A well known author has the advantage because, well, he/she is known and likely to attract more lookers in the store. I honestly don't read anthologies because I really don't read that many authors. So, for instance when I had read through about half of the WoT series I saw New Spring in that one anthology and I thought "Heck, RJ - I need to read this. I grabbed it at a library but my point is still the same. If I hadn't noticed RJ I wouldn't have bothered because at the time I wasn't reading anyone else in that particular anthology. I did end up reading one or two more stories in that book but I don't remember them blowing my doors off or anything so I didn't continue with those authors or the rest of the book (plus I had to return it!)

As far as what can be added to make it more interesting? I am honestly not sure I care what an editor thinks of the story. But, I would find a commentary by the author more intriguing. It always helps when reading a story to know what the author was trying to get across or how the author came to develop the story. I never looked at Misery the same again after I read that it was actually a story about Stephen King's cocaine addiction. It didn't diminish my own interpretation but it added to the story and gave me another view of it that I never would have guessed. I like when the author explains something that adds to the background of the tale.