AAD Group Licensing Limitations

Whilst trying to setup the Dirsync/AAD Connect group licensing, I came across this the link below:
https://docs.microsoft.com/en-us/azure/active-directory/active-directory-licensing-group-advanced#limitations-and-known-issues

Great read, outlining the following limitations of AAD Connect replication:

  1. Group nesting.
  2. Group licensing being only available to security groups.
  3. Impacts of removing a user from a group.
  4. Performance implications.
  5. Logging and auditing.