With so many custom fields required to capture our congregation and beyond, the Merge Duplicates feature becomes extremely difficult to use. We have maybe 100+ custom fields, for children, volunteer compliance, youth etc. They all show on the Merge Duplicates page.
Request is for only a small change: either by default only show the "actual differences" between people, or maybe just a highly visible checkbox to "Show only differences between people".
That way it only shows the fields that are relevant and different. Much more usable in my opinion.