Voicemail Greeting and Desk Phones

We are doing some more testing and deployment of Cloud PBX and have recently flashed a few Yealink phones with the SfB firmware. One major missing feature is the ability to record voicemails from a desk phone or from the mobile app. How can you do a major deployment if everyone has to record their greetings from their desk with a headset. 

This also makes it very difficult to change your greeting for when you are out of the office or on vacation. 

Also any plans to make the deskphone act as a pass though so that dialing from the skype app would connect the call on the phone? Or ring the phone directly instead of both ringing at the same time.