In my company we use the SCM plugin a lot for aggregating various components located in different repos, and we would find our changelogs much more useful if they would be split by repository in which the changes happened.

At the moment they are split by the type of SCM (git, SVN ,etc.) but that's not useful if you have only multiple git repos and no SVN repo, for example. We just see a list of all the changes that happened across all those git repos which is not really useful.