The select box on "Add Gallery / Images" can easily get distracting and unfriendly with sites containing a lot of galleries. Most often than not, such sites would have galleries organized under albums.
Ideally, galleries under albums should be put under optgroups with the album name as a label.
Similarly to the above concept, galleries in the "Manage Galleries" page should have this sort of feature (maybe a column specifying album name?).