GSAK continues to try to be everything to everybody, which may make it difficult to learn but worth the effort.
A new feature, something that I’ve thought that geocaching.com should have now, has been added to the newest release (Feb 17).
This new feature is the ability to filter the caches based upon a text search. For example, if you are interested in historical locations, then search for ‘histor’ (this will find caches that use the term history, historic etc).
Combined with the already rich search options makes finding the cream of the caches (for your definition of cream) possible.