Not using soft phones, using a full internal VOIP system with physical desk phones.
I only adjusted bandwidth limits on PCoIP to help with the jitter and cutting in and out of the phones.
I have looked at CPU/Memory and they seem to be fine... host server is running at only about 2 GHZ CPU usage and 18 GB RAM usage while individual VM usage is around 500 MHZ/2GB respectively.
The issue has appeared at the console as well, I took that step last night after posting just to see if that was the case.
I can run the application from a machine on the same network as the virtual desktops and it is fine, only from the virtual desktops is it slow..... odd thing was I made the adjustments on Monday... Tuesday all things were good.... it was yesterday the issue came up and I have no idea why... nothing (to my knowledge) has changed.