It should be noted that the receiver doesn't (can't) use the front wides except for Dolby Atmos content, so with a 7.1 Dolby TrueHD track you'll get two silent speakers.
DTS:X is still limited to 11 channels at the moment and the DSU from Dolby it's designed not to use front wides except with Atmos (so it won't likely change in the future).
Even with Atmos what you get from the front wides can vary, at times being barely perceptible.
Users on another forum over the pond (!) have reported the lack of front wides usage as a major disappointment, as seems it was promised in the pre-launch material, until a "typo" was corrected from official documentation, if I recall correctly.
Said that, I bought it anyway!!
It was a due update from my good ol' Onkyo 705, and I'm quite happy with last weekend testing of Atmos movies with a 7.1.4 configuration and, eventually, the capability to specify a 2-channel setup when playing stereo content (so I can set the front speakers to large and avoid using the subwoofer, which is the setup I use for movies/multichannel).