Public outreach/Academy/RfC/Long-term watchlist
A drawback of the current watchlist system is that it displays only the latest change. Unfortunately, this approach leaves open the possibility of a slow, gradual decline in the quality of an article.
Idea: implement a tool that ranks articles in the watchlist by how much they've changed (in bytes) since they were last edited by the user. Such a tool might give the participants more confidence that they'll catch systematic degradation in the articles they edit.
Watchlist vandalism checker 
A concern of the participants will be whether their articles will be vandalized.
Idea for client-side script: allow users to define their own criteria to check whether articles on their watchlist have been vandalized.
Another idea for client-side script: Use the history to determine how often a page is vandalized, edit-warred, tagged as controversial, etc.