The main reason we don’t have hotkeys around is that they are hard to communicate in our program. Adding the export/save/load are quite straight forward, so I’ll try and look into it in our upcoming patch. Toggling packages on and off however is a different question, and I don’t think it would extend functionality a lot as we need to refresh the editor for it anyway. It’s also quite rare to have all owned packs active at the same time.
I was trying to add some kind of visual aid for the save files when saving them (like custom icons with a snapshot of the character), but it is incredibly tricky to get it right. As it’s only a tiny data file, there is no way in the program to display it without actually setting the editor to the state it was in when the save happened.