Ratings Design?

I like this article. It's saying things I'm glad are said.

In the article, I wanted them to address what a heterogeneous system of ratings would look like.
Rather than having a cross-section of ratings for each product, how could they implement a system that functioned well for expert users (for buyers of books or movies) as well as for novices (the same people purchasing computer equipment).

Amazon is the example that is interesting. I think their rating system functions fantastically, though I almost only buy books from them.

The doctor rating system could definitely work by having doctors rated on their characteristics, but having the characteristics measured for a surgeon be different than those for an oncologist.

But for Amazon, the system that works well for books would be confusing with cross-sections. You don't reflect on a book's use of metaphor or warmth of language (I don't). I mostly just have a feeling about myself after having read the book.

When I reflect on my laptop, my feelings are much more in line with how much the laptop conformed to or exceeded my expectations. I don't think of the change since in my essence since I got this laptop. (notwithstanding Apple users)

Maybe Amazon needs to set up Amazon Books and keep its legacy rating system and have an Amazon Products with the cross-section system of ratings. I wonder how such a splinter would work out. They already do so to an extent, but an explicit subdivide with a different service provided would be interesting.