I have now found the time to test this and can confirm that it works as expected.
The only thing that might be a bit irritating is when you change the URL, lets say you have a title and thus a URL of “afamily” and then change the URL to “gfamily”. Then the order that appears in the panel will still be “A” as long as the title is still “afamily”, because the sort order in the panel is according to title not uid. However, it wouldn’t make sense to change the URL if the title is not changed, would it?
When you output, the “internal” sort order by UID will be used, as long as you don’t sort by any other field.
If I change the title, the UID is updated automatically, so no problem.