We included a "Merge Filter" option to merge down filters, but we found it was often overlooked.
Denis Rangelov (npub16cx…jfpd) came up with a redesign where we added an icon toggle next to the OK button. I put together a prototype to test the UX experience. Feel free to try out the AppImage and let us know what you think!
https://gitlab.gnome.org/GNOME/gimp/-/merge_requests/2626