Well I changed my setup to FH&RH and re-ran Audyssey. I'm pleased to say that I could tell no difference of object placement/aural positioning in regards to content I was extremely familiar with, aside from the Vudu Atmos Demoes (John Wick: The entire ending sequence chase and Gravity: The re-entry sequence).
However, I immediately noticed a difference using DTS:X. Not only was TLWH test tone height callouts only tied to their respective speakers as opposed to being a summation with their base counterparts, but in the beginning of the movie when the witch curses Dolan and then transitions to the airplane, I could clearly hear the overheads dominating the base (the base was still receiving information related to the scene) as I feel it should have when I first listened to it.
When I had my assignment set to TF&TR previously, it seemed about an equal amount of sound was distributed to the top and base speakers. It still seemed as if the plane was above, but not quite as well defined, so that alone is enough for me to stick with a FH&RH setup. Luckily for me, as I said before, my speakers are able to be considered in spec with either assignment.
Just wanted to post this in case it could help anyone!