I'm posting this follow up on my previous comments, hopefully it will help someone. I ended up returning the tent to REI (who, as always, were extremely accommodating and eager to get feedback). In the future, I don't think I want anything to do with these "innovative" Yakima products anymore, they should just stick to making roof racks and boxes...
The reason is that there were a number of issues with my tent that I just couldn't get past, the cosmetic dents and dirt/shavings notwithstanding. My worst fear when I bought this tent was, did Yakima engineers (stateside, not in China where this is made) really put much time and thought into this? I'm afraid my conclusion is, likely not.
Functional Issue #1: One of the corner zippers on the travel cover broke off in my hand the first time I tried to zip it. The tent just wouldn't close fully enough no matter what type of "tuck" we tried with the rainfly and tent material. This would only get worse with 3 peoples' bedding stored inside.
Functional Issue/Concern #2: The durability of the Velcro cinch straps is highly suspect to me in the long term under these conditions. I think Yakima tried to go too low of a closed profile with this tent. To go through all this to achieve a low profile and then design a mounting system that adds 25-30% more height is just terrible design practice...
Functional Issue #3: We never could get the tent to open a full 180 degrees. Now, I don't know if all RTTs are like that, but after close inspection, one of the two straps that goes along the roof pitch appeared to be sewn too tight, preventing the two extrusions at the hinge from interlocking like they're supposed to. Again this is another durability concern to me, and we weren't sure if this position would be comfortable or not to sleep in.
It looks like Yakima are aware of at least some of the issues (see attached picture I took of the bulletin board at the local REI), and doing their due diligence in terms of quality control, but I'm not very convinced that this will resolve any of the fundamental concerns I shared above.
Thanks for reading.