This investigation was quite interesting and reasonably carried out. But as usual these kinds of things tend to exclude non-English speakers, as evidenced by the fact that there isn't a single non-english suggestion in the list. They might even have interesting ideas that don't occur to larger wikis due to their heavy use of bots. Although it is understandable that this wasn't designed to be as extensive as the community wishlist.
Perhaps before future research in both well liked and "disliked" ideas, Extension:Quicksurveys could be create a translated survey. It might even be improved to take freeform ideas for such projects, allowing staff to later translate, remove all spammy stuff, and provide a page for discussions of such ideas.
Contributors to this informal discussion from bigger wikis might be blind to the needs of smaller wikis due to the heavy amount of vandalism and issues experienced on that scale. What may work terribly on a big wiki might in fact be perfect in a smaller wikipedia, and might later even be adapted to cater for larger wikis. A good example is Extension:ContentTranslation which larger wikis probably don't care for due to the potential for vandalism, and the amount of errors added by non-native speakers.
A smaller wiki may welcome such tools even with all their flaws due to the fact that they can gradually improve such articles.