Add a live filter to temporarily exclude items from existing duplicate/search results.
This would allow scanning everything but then only performing actions on a subset while retaining options like one checked per group on just those that are currently visible.
There will be some new options in V8.5. For example, you will be able to lock certain path, so that they cannot be check-marked. That way they still appear in the duplicate list, but will never get processed. Excluding them has the disadvantage that you would have duplicate groups with just one file.
it would be nice to have an exclusion filter that you can edit at any time; With the reference to the submenu, I no longer see any possibility of influencing it, possibly of undoing it again.
In the right click menu of the search results, there already is a submenu "Remove from search results" that allows this. Some more enhancements in this area are planned for V8.4.