I've definitely had both good and bad results with Audyssey. The good results have almost always come with limiting correction below 300Hz. Don't think I've ever had a positive full range correction with Audyssey.
Dirac is a bit better and more customizable, so waiting for those Onkyo units may be worthwhile. I've even had good results with Dirac letting it do full range correction on neutral speakers(though I've also had negative results doing that).
YPAO has almost always been negative .
I'm also still a big fan of just using REW to generate the filters.
1.Upload the target curve you want in your profile settings
2. Click on the measurement you want to correct, then click "EQ" on the top bar
3. Set the correction type "Full Range"
4. Move the target curve up or down so it best fits your measurements
5. Set the max gain to 0 and allow narrow filters below 200Hz
6. Limit the correction range to what you think works best for your room(generally 200-500Hz)
7. Match filters to target
8. Repeat for the other channel(make sure you set the same target level)
9. Close the window and do File > Export filters > Export Filters as .wav > select stereo > put left on left channel, right on right channel > save
I've had generally really positive results with those settings, but YRMV.
Lots of good information. I have a few questions in this regard. When you export the filters, what are the options to use and implement those filters?
I am assuming the typical method should be load/import them to ROON ? (correct me if I am wrong)
What are the software and hardware alternatives if you don't use roon?