As I use PS more, I continue to find things that I really like about it.
As I am curating my photo/video images (using digiKam), I upload my curated results to SmugMug where I can further create smart albums for certain collections I think would be of interest to my family and close friends. One feature SmugMug has that I really like is the concept of related tags.
For example, if I am viewing a photo tagged with “john” and I know John is married to Sally, I can add a related tag of “sally” to view a collection of all items tagged with “john” and “sally”. I do not see any easy way to replicate this in PS. I know I can search for kw= but honestly, for family and friends, this isn’t very intuitive. The SmugMug implementation is very intuitive and easy to use.
The PS search bar should also be simplified for non-tech users. Having a global search capability (i.e.: search the requested item in description, title, keyword, etc. fields automatically) would make search much easier for non-tech users. You could retain the tag specific search capability for those technical users so inclined.
And as mentioned in other posts, provided a geo-location map capability would also be helpful for those items with geo-tags.