Achavi's main use is analyzing changes in an area between two time periods, but it can also analyze changests.
However, for some reason, that feature is not exposed via a graphical UI and requires tinkering with bookmarklets or urls. The Achavi "about" page claims dragging and dropping a changeset URL would analyze it, but this does not seem to work.
I created a simple helper site. Type a changeset ID or URL, and it will be analyzed with Achavi.