When I browse a repository in Diffusion, I can get to the list of pending revisions by navigating to the repository and then clicking on one of the branches. This implies that the list of pending revisions should be filtered by branch (presumably by the branch onto which the revision will eventually land). However, this is is the same for any branch, which is a little confusing - I navigate to see the history of status of a very restricted support branch that should have almost nothing going on, but I see a bunch of pending revisions, none of which actually have anything to do with the branch I'm looking at.
It would be good to either actually do the filtering, so that frozen branches really look like they have no activity or just move this display to be repository-wide, rather than per branch.