A bulk determination of decimal-ratings and ratings-count are of interest both when deciding whether to select books to put into Calibre and when identifying a group of books within Calibre from which to select one for reading.
Prior to seeing this thread in mobileread.com, I was looking on the internet and came across the following March 2019 article. I don't have the technical ability to determine if the approach is similar to the approach used for the "F_frating" plugin, or might provide some related insights, so just posting the link here:
https://usman.io/goodreads-decimal-ratings-in-calibre/
I share the view expressed in that article and by others that the decimal-rating can be of questionable value without the rating-count. The article seems to make reference to using the ratings-count but I did not see where it was identifying how to bulk-download the ratings-count for Calibre.
Thank you for your work in creating the F-frating plugin. Its the first time I've seen that capability of downloading the decimal-ratings.