I have done a lot of beta testing regarding dante/ravenna/aes67. This has included both hardware and software in different configurations.
Dvs and via can be installed on the same computer without any problem, at least on my test computers running osx and windows. Dvs and via have a blocking mechanism that only allow you to run either one but not both at the same time. If you have heard anything different then this has not showed during my tests.
Tell me you are not trying to use DVS and VIA on the same computer on the same network at the same time. From what I have heard the two pieces of software are nearly incompatible. I'm not really sure what the point of VIA is, other than to use a USB/Firewire/Thunderbolt/PCI audio interface on a network without other Dante hardware. But from what I have heard, even just having the two pieces of software installed at the same time is a show stopper.