The change logs are for internal use; they aren't for your customers.
I'm not going to be one of your customers, then. I check the changelogs of every Cisco IOS update I deploy. If they changelog isn't published yet, I don't deploy.
I'm not going to add risk to my environment if all the new version did was fix bugs in features I don't use and add new features (with new bugs) that I won't use.