I split off this post into a new thread in the correct forum.
Theme category pages were converted to the new site style, and as part of that, were made to be consistent with other add-on types which we have many featured selections chosen by our community, as described in our policy
. Themes are different from other types of add-ons though, and we don't maintain the featured list nearly as well as for other types, so it was a mistake that these are defaulting to the featured view.
We're going to change the default to the Most Popular view -- by next week's release at the latest, though I'm trying to get it fixed before then. Sorry about that.