It may be a little niche, but I would like to see the option of a common area phone ringing regardless of who is logged into it.
For example, if there is a Common Area Phone in 'Room 1' and 'John Smith' logs in, it is no longer possible to call 'Room 1' without knowing who is in there..
I would like to be able ring 'John Smith wherever he is' or 'Whoever is in Room 1'
Enable-CsUser has -DomainController, as do Get/Set-CsCommonAreaPhone. Being certain which domain controller a Common Area Phone is created on would enhance provisioning performance, enabling policies to be granted right after object creation.
This affects large environments with multiple DCs in far-flung locations.
This discrepancy is still present in Skype for Business Server.