I have a suggestion for your next update of PI 3. How about adding the ability to add individual emitters from the libraries to a favorites library. That way, you could go through all of your libraries and consolidate the emitters that you use on a regular basis. Would be a great time saver. Just a suggestion. Thanks.
You can do that with the library manager right now. Load the "blank" emitter library (or any library you want), then r-click in library window and "save as" and call it "favorites". Then open the library manager, delete the emitters you don't want in the favorites folder (you have to leave one though), then go through all of your libraries and add your favorites using the "Add" button.
I caution you against making any one library too large. It will hurt performance.