The #1 thing that I need from Mint is 100% reliable integrations so it can automatically pull all my data, which it no longer provides. I have been talking to their support for about a year asking to fix an integration with US's largest mortgage servicer.
The #2 thing is reliable inference of transaction categories. That's also starting to wither. Categories are all over the place.
Everything else I really don't care about. Even if there's on interface and just a big "Export to CSV" button I'd be thrilled about it.