I love the editing feature that was added a few months ago. It works very well for the most part. However, the editing interface only allows fields to be edited that were entered when the record was first indexed. Occasionally a record will be indexed with only a given name or only a surname, which then means that the editing screen only allows editing for that field. Unfortunately that means that a user can't properly edit the record.
This record is an example of that issue: https://www.familysearch.org/ark:/61903/1:1:MD8K-TZY. The person doing the original indexing couldn't read the surname, so only recorded a given name of Nancy. I am able to read the surname for the record. But when I go into edit, I am only allowed to edit the given name field. No surname field is available for editing. I have edited the first name to include the surname, which allows others to see the name. But it will prevent this record from being searched and found by others.
I hope this can be fixed in upcoming refinements of the edit feature.