I just looked at "Lucy" and several of my "go to" You Tube UHD HDR clips via the UB820 (Optimizer "ON") and the new JVC-Panasonic color profile (High; 500 nit). The images were absolutely gorgeous. A new finding is that, although the manual sliders remain enabled for picture tone, bright & dark levels, the NX7's auto tone mapping feature is no longer accessible when the User mode for the new JVC-Panasonic custom gamma is selected. Interestingly, the picture tone was set at +9 (bright & dark tones= zero); I assume that's intentional tone mapping as a feature of this synergy.
JVC NX7, Yamaha RX-A3080 (2 discrete 7.2.4 speaker layouts: Dolby Atmos & DTS:X), Panasonic UB820, Panasonic UB420, Oppo 103D, ATV4K, Roku Ultra, TiVo Bolt Vox, Vandersteen Model 3 Signatures & VCC-1 Signature, Atlantic Technology (side, rear, front height & overhead) surrounds, SVS SB-2000 (2), Clark Synthesis Tactile Bass Transducers (2), Polk PSW-12