Judging by @Josh2000’s Community based change log for Volumio 3 initiative, and a few other threads on the topic this is an aspect of Volumio that can be significantly improved!
The current official changelog is maintained at Volumio Changelog
A well structured changelog would make tracking bugs and fixes so much more streamlined, instead of the current scattered around threads/issues/tickets/feature requests.
Also since we utilise github for the dev work, a little bit of structure can give you comprehensive changelogs pretty much automatically.
For some perspective - here is how some of the others handle it.
moOde