Filter by all metadata

Especially with the disappearance of smart albums, it is very difficult to filter a set of photos now. Smart albums would be ideal, but even trying to create a static album from a filtered set is near impossible. The app seems geared toward smartphone photographers, yet inexplicably includes "Cameras" as one of the 6 filter options.

Why camera but not lens? Why locations but not creator or copyright? Why video vs photo but not raw vs jpg?

The idea would be to bring back filtering by any metadata, customizable via contextual click on the filter bar (and secondarily to be able to create a dynamic smart album out of that).