The biggest additional feature in the subscription based app is auto-importing transitions. Personally, this is not of interest for privacy / security reasons sharing my banking passwords.
Recently added budgeting to the mobile app. Most of the user-facing improvements have been cosmetic to UI design, colors, and phrasing.
The reports still are not at feature parity with the old YNAB4. Fortunately there’s an open-source Chrome extension - Toolkit for YNAB that improves reporting and charts. However, I find it disappointing this functionality isn’t built into the App.