Provide a way to filter Special:NewPages to subpages of a given page. It could be useful for example to see new articles for deletion discussions and for other processes relying on subpages of a main page. There are also some projects heavily using subpages for content which could benefit from this.
It can be only a url option if it can't be neatly included in the interface - we can always link to it.
Version: unspecified
Severity: enhancement