Having used the ATV 4K for a while now, been reading up on it, and getting some things straight in my head here is what I've learned about the major complaints about it.
1. Lack of bitstream/HD audio/Dolby Atmos
First, set the ATV 4K Audio to Best Quality if it is going into your AVR. Nothing else makes sense. This allows the ATV to decode the audio rather than your AVR doing it. Setting the ATV to Dolby means ATV decodes the audio then recodes the audio then your AVR will decode it again.
Second, since I know of no streaming services that provide HD Audio or Atmos I assume the issue here is for local media only. I'd recommend Infuse (there are others) that will decode the DTS-MA/TrueHD/what have you audio on the ATV and send it as PCM. Yes you won't get the pretty branding light on your AVR but whether Infuse on the ATV or your AVR decodes the audio is irrelevant for the most part. You will get HD audio out of your ATV. See here https://support.firecore.com/hc/en-u...-Options-tvOS-
. If your someone who likes the post processing effects your AVR can provide then at least my Denon can apply those to LPCM as well as any other format.
Finally, Dolby Atmos is an issue, there's no way around that at the moment to my knowledge. Give it time if you ask me.
2. Auto Selecting Correct Frame Rate
You do of course have the option of doing this manually but that is less than ideal. At least there is the manual option unlike Rokus and Fire TVs.
However, and I can only speak for my LG 2016 and Denon S920W but this is a non-issue
with that setup. Make sure you have Real Cinema On and TruMotion set to User with De-Judder at 0 on the LG. This will kick in the LG's processing to deal with a 60Mhz stream to process as if it was 24Mhz for 24fps sources. It will undo any pulldown and display the picture at 120Mhz. There is no difference in what the panel displays between this and a 24Mhz (or 30Mhz for that matter) signal.
In summation this is a non-issue on LGs if set correctly. Other TVs may vary. There is no need to change the refresh rate manually to avoid 3:2 pulldown. The TV will do it for you. The judder you see will only be the natural judder of 23.976.
Believe me I had a TV that did not do this correctly and getting the right refresh rate from the source was critical. That's not so true anymore with most modern 4K TVs.
3. SDR to HDR conversion
Again, you have the option of changing this manually. Again, less than ideal.
However, first try checking the HDR Picture settings on your TV. Turn off all the special processing crap like dynamic contrast and edge enhancer and stuff just as you would for your SDR picture settings. The key one to reset properly is Color Gamut. It should be set to Normal. I know that doesn't seem right but this video has proven true.
Having done that play some SDR content with the default HDR setting that the ATV 4K gave you. They are not equal but 90% of the bad stuff goes away such as over saturation, over sharpening, etc.
Not only will it get you a better picture for HDR source, it provides you with a fairly pleasing SDR to HDR conversion much like a pleasing 1080 to 4K upscale. Yes, for purists it is not the original but to my eyes it's like getting pretty close to an HDR version of the content. It is better on 4K SDR sources than 1080 SDR sources but is pretty decent in both cases. It brings out the film grain a little on 1080 SDR sources. Try it an see if you like it or not. I originally hated it but having watched a couple of 4K SDR episodes of Narcos with the HDR setting I never noticed anything bad happening to the PQ and going back to 4K SDR looks flat to me now.
Now that I've got my settings on the TV right this is again a non-issue
for me so far. Time will tell if other sources will annoy me but at least Netflix, HBO, and CBS were fine.
4. Dolby Vision vs HDR
This is kind of still a proverbial bag of hurt as competing standards often are. DV looks better to me than HDR10 (even though my TV only support DV at 24 or 30). It would be nice if the TV auto switched to the right setting. My only real choices here when watching a DV source are to switch it manually or live with the slightly less fantastic HDR 10 picture. This is the definition of an embarrassment of riches I know, but still it would be nice for it to auto-switch. On the other hand I probably only watch 1-2 DV titles a week so it's not all that constant a pain.
The moral of the story here is I'm sticking with the ATV 4K despite its short coming after seriously considering returning it.
My Roku Premier+ has been a royal pain with handshake and HDCP issues. The UI is fine but a bit clunky and it does only turn on HDR when needed. On the other hand there's no Dolby Vision at all. In summation switch to DV on ATV 4K sporadically is much less painful than my Rokus have been.
FireTV is pushing banner ads not only on various pages but actually as item in content carousels. Plus Amazon pushes Amazon WAY too much for my tastes and I love my Amazon Prime Video. A good UI has been destroyed by these things IMO and it's a deal breaker for me.
nVidia shield is the only other option realistically and does have some good features but auto refresh rate switching is a bit flaky as is HD audio. Plus, I am constantly annoyed by the UI and finding content. Again the pain point is constant and much higher than the occasional manual switching to DV on the ATV 4K
Your mileage may vary.