Sorry if this is already in the hopper or (!) has already been done, but it seems long overdue: We need a way to compile, based on lists of links (I guess), "Recent Changes" lists for all articles about a general topic.
This has been doable since Magnus's software, and still is; the hard work is just compiling the list of links. Once you have a page of links, say, "Wikipedia:Major philosophy articles", then you can just use the "watch links" feature of the sidebar to get a list of recent changes to all pages linked from it.
Perhaps that feature could be added to, or tweaked to add filters, etc.; but there's no point in wasting the effort to do that until it has actual data to work with, and that will take people creating those link pages.