Windows Server 2012 is doing the same as most modern software - it is losing features. Sometimes that is a good thing - losing fat is good, spring cleaning your home is good... Trimming the fat from bloated software is definitely a good thing. What is NOT acceptable in my mind, is removing crucial functionality under the disguise of an upgrade / improvement.
I can think of many examples:
A specific example I want to touch base on is Windows Server 2012 R2 that cannot show you the IP address of an RDS session any longer. You used to be able to right click on an RDS session in Remote Desktop Services Manager, select Status and see the IP address and client name of the connected session. No such feature exists any longer in Windows Server 2012 R2. Not even going to PowerShell and executing
Get-RDUserSession | fl
gives you the information you seek. The only solution I found was by downloading and installing this tool, and then typing in the following in PowerShell:
Import-Module PSTerminalServices Get-TSSession
You will now see the session list and the associated IP address and client name.