Let me point at first, it is possible I have a defective unit/bulb.
I agree with what folks are posting regarding tradeoffs with HDMI settings, I will settle on standard or superwhite for my viewing. Ideally, Standard mode would allow slightly below and above black and white video levels with minimal changes to brightness/contrast settings for maximum light output in video range. Basically nothing changed from the RS50 so this is really not news.
With my unit, there are issues with the CMS still. I am finding while Colors are close to Rec709HD in "Standard" color profile, when using the custom 1 color profile to dial it in further, saturation control is unresponsive for primaries, secondaries and orange--regardless of where the control is moved. This is a problem. The CMS "blanking" issue still exists, when changing color settings the screen is blanking for .5 to 1 second. I am assuming that JVC was unable to correct this since it existed in the RS50 as well, it does however seem quicker. Overall colors are very accurate out of the box.
The ISF Calibrator II software cannot access and unlock the ISFccc modes, it seems there needs to be an update to allow one to use this tool for calibration, most use DDC with Spectracal so not sure if someone can check if it works with that software or if it is a JVC software issue.
Finally, I have noticed an anomaly when viewing 100% Gray Field pattern via an Accupel pattern generator. There are colors all over the screen, patches of red and green. I replicated this with the JVC Service Menu 100% Gray Field pattern as well. I also disabled MPC in the service menu in the off chance this was causing an issue, same result. In the off chance the Dalite HP screen is causing this, I am going to do a sheet test as well. I would be surprised if this was the case the RS50 did not have this issue.
I can't say that I've watched much content yet, some test material should reveal how bad the issue is, hard to tell in the compressed picture, but I included it anyhow.
I have an email into JVC engineering.
So far good and bad, let's assume this is a bum unit.