Proposed solution: Add an option to hide sets of edits that collectively produce an empty diff. Such a set commonly includes one or more edits by a vandal and a rollback edit.
Who would benefit: Editors with many pages on their watchlists. My watchlist contains over 700 pages so hiding the edits that don't require my attention would be a huge help.
More comments: As a workaround, I configured my browser to run following JavaScript snippet every time I open my watchlist: