You can check out the full release notes at Adobe.
I am most excited about being able to access multiple lumetri effects from the Lumetri Panel, instead of only being able to access the last added one, and having to make changes in the effects panel.
Also looking forward to trying the Intelligent Audio Cleanup Tools.
I haven’t really played with Templates from After Effects, since I do my own graphics, and it just seems easier to make the graphics all the way in After Effects, but I will eventually play with it more.
No mention of having fixed the having to render audio to see audio in a multicam clip in the timeline. I am hoping that bug is fixed. I hate having to render every time I open the project, it is just frustrating and unnecessary.