The Learners reports show tons of information when you export them, like Supervisor, Group, custom fields, etc. This makes it very useful for our clients who prefer to do things in Excel, or need to gather email addresses to contact people, or even just have an export for their own records.
The newer compliance reports have filters for these fields, but they don't show up when exported. In fact, the exports really only show what's on the screen, making them much less useful for people who do use Excel to do more advanced things, as well as for recordkeeping.
I'd love it if the export showed more info in the CSV than what you see on the screen, making them just as useful as the old reports when exported.