All I'm truly interested in is getting Netflix and Amazon Prime to integrate well with Theater View (I specifically say Theater View, as I never want to leave Theater View and want MC to operate as much as possible like an appliance).
Currently, I have Theater View links for Netflix and Amazon configured to launch an external program (Chrome) in full screen mode. And it works decently. I mean, my 5-year-old can easily turn on the TV and navigate in Theater View to "Netflix" and watch his shows and have control over the volume...that is if I don't have ZoneSwitch enabled. If enabled, he tries to adjust the volume but it is controlling the default main zone "Player" (which is not active). I can't exactly tell him to "exit Theater View, go to Standard View, use the mouse and go over to Playing Now and click on WDM zone" (in fact, in my mind, if I ever have to tell someone to "exit Theater View and go to Standard View" to fix something, that is a huge fail and a literal showstopper for me).
So, I leave ZoneSwitch disabled and configure my default main zone ("Player") to have buffers set to 10 ms (both "Buffer" and "Live Latency") in order not to have lip sync issues with WDM audio from Netflix. This works well 99% of the time. But, on occasion, I get audio hiccups (manifested as pops, clicks, stutters) while watching Live TV with my HDHomeRun Prime. This leads me to searching the forums every few months to see if anyone has figured out a fix.
I love the WDM feature. I think it's brilliant. I think the ZoneSwitch is pretty cool too. I just wish there was an option to autoselect the active zone upon switching zones.
PS
There are other minor issues with WDM in terms of seamless integration with Theater View that I am omitting