What do you need?
I saw that there are change logs for page history, but it would be great to have a changelog/diff stored for things such as the global CSS and landing page as well.
Why do you need it?
Sometimes another admin may make changes that you are unaware of that may cause unexpected changes. It would be good to have a history of these changes so that rollbacks or better-informed solutions can be done.
How would it work?
Just a simple side to side comparison of the old & new text content would be great. Kind of like a diff on github but no need to highlight the diff and collapse the unchanged sections.