Problem: When using the Visual Editor for adding citations (e.g. using a DOI), it only considers the first 5 (de.wikipedia) or 11 (en.wikipedia) co-authors. Hence, all other co-authors are silently omitted, i.e. no et al. draw attention to the fact that there are more co-authors.
Proposed solution: If the number of co-authors is considered too long so that some of them is omitted, et al. needs to be added by default.
Who would benefit: All readers of Wikipedia articles who would no longer be misled by incomplete listings of co-authors.