I think the trimming of the recent change cache to one page is too
short. If you have editors who in the course of changing one page, end
up making several edits, the number of pages showing in the list can be
reduced dramatically and possibly important information about other
changes is not seen.
I know $conf['recent'] can be increased, but it has the side effect of
increasing the number of changes shown on one page.
Does there need to be a number for this at all - ie. is trimming by age
(b) Adjusting recent change presentation
Now the recent change list is much reduced, is it worth extending the
page to make it expandable. ie, show the most recent edit of each page,
with an clickable indicator showing more edits to this page have been
made recently. Clicking the indicator will show the other recent
changes to this page.
Often minor edits/corrections are made to a page shortly after a major
edit, caused by the extra numbers of eyes reading the page. Having a
simple way to see other recent edits, will easily give access to the
summary describing the major edit.