Jul 25 2019
I've made progress on this. The page already calls a template ("Coloured cell") per cell, so my concern about template limits is irrelevant. So I decided to go with your "option 2", and made a helper template to generate these links. It has been set up as a wrapper for Coloured cell.
May 30 2019
May 22 2019
Or if that is too much, scrap the counts entirely (a percentage is already clear), and add two links with the symbols + and -. So it could end up simply as "86.56% (+ -)"
In the brackets you already show the number of items with this property. Hyperlink that. The second link for the negatives could also be in the brackets as a count, so it might look like "86.56% (2300:357)" where both the 2300 and the 357 are hyperlinks.
May 21 2019
Does wikidata have a limit on how many templates can be on a page?
Jan 19 2018