I know that it’s important to maintain consistent reference systems for ancient texts for a variety of reasons, but still — would it be possible to have an international summit to renumber Augustine’s texts? In many of them, there seem to be two parallel systems of numbering that have no relationship to each other. One system generally counts off smaller portions of the text, but only occasionally does the inclusion of that number in the reference give you any more precision.
Another fun project: shifting around the chapter and verse breaks in the Bible. Romans 8:20-21 jumps out as an obvious case of a verse-break gone awry, and I’m sure there are many others.