On the Find New Add-Ons page, the pulldown with "Staff-Picked", "By Atlassian", etc. lack the most important entry: ALL.
This list is illogical. It seems to mix some sort of arbitrary filtering ("Staff-Picked") with sorting ("Most Popular", "Top Grossing").
In any case, I can not easily BROWSE for the add-ons I want to find: e.g. select "Themes", and the ThemeBuilder doesn't appear anywhere. I always have to already know the name and explicitly search for it.