The following fixes and features are available on the stable channel:
Features & Improvements
Add support for font family grouping. See the documentation here
Bug Fixes
Custom Tools: Escape Custom Tool IDs in CSS selectors to prevent styling breakages
Paragraph:
Fix handling of inlineFontControls on templates created with a different config
Fix inconsistent paste formatting and only show the Clean Paste prompt for plans that include it
Merge Tags: Fix UI issue in dropdown list