I just realized that the save/restore does not allow one to clone a filter/slider. I added that to my list to do. I haven’t decided how the interface should look on that.
I personally don’t use the shortcode directly any more. There are just too many variants to remember / get correct. And the insert button is just so easy to use. At least for me, it is just easier to use the filters. Each filter requires a setting to be saved in the WP database, but it is really tiny and there would be no measurable affect on anything else.