You can look here and scroll thru the updates and see if anything looks like a feature you need or want.
ipcamtalk.com
Most of the improvements have been related around AI and switching from DeepStack to CodeProject.
Some UI3 enhancements and other updates to BI added additional functionality.
And bug fixes from one version to the next.
As reference I am still on 5.5.6.xx because Deepstack flat out works for me and reading all the issues folks have had with CodeProject, I don't have the time to spend to troubleshoot if the system goes sideways with an update.
Sure there have been some improvements I would like, but not to the point I want to mess with what is working perfectly at the moment.