Just wanted to say I think this TV (65E6P) is at the end of its road with me. I've loved certain things about it (the blacks, the picture on SDR, the fantastic OS), but it's also in some ways one of the more frustratingly problematic sets I've had.
Burn in in three places (two from Zelda Breath of the Wild, the worst being hearts in the upper left corner) and I'm beginning to see the CNN logo burning in as well.
In addition, I was never able to completely solve audio sync issues (from external devices such as AppleTV) at anything but 60Hz (quite minor for SDR, but increasingly apparent in HDR and Dolby Vision). I finally gave up and locked it at 60Hz...there's judder, but I find it more acceptable than the alternative. I just use the native TV apps whenever possible to get audio sync and native frames.
Finally, while I do use HDR for gaming as it appears to work pretty well since that last update, I've given up on both it and Dolby Vision for movies and shows. It's way dimmer than it should be, even though the settings seem correct. Some things seem to do better than others. Dynamic Contrast sort of fixes it, but after trying to force myself to watch it for a long time, I still think the picture from 4K SDR is better... Yes, some of the lighting highlights aren't there, but overall everything just looks more appealing... I think this may be something with the 2016 OLED's in general and look forward to giving HDR and Dolby Vision a shot on the next model I try (which probably won't be an OLED - leaning toward a Sony LCD - given I game, OLED is not for me because of burn-in).
Anyways, I haven't bit the bullet yet, but I wish you all luck with your current equipment and future equipment.