A couple minor annoyances with Pro 6.x:
- Inspector sections no longer have clickable anchors requiring much more scrolling
- Dragging and dropping HTML tags in text code view now attempts to import a file! I use tag drag/drop a lot working with code, so the muscle memory is hard to change
It would nice if HTML text input could use the code editor that Gutenberg uses. It supports syntax highlighting and other modern code editing shortcuts.