If you don't mind I'd like to give you some feed back on this design as a potential customer. Food for thought if you will. I've been very interested in the Moab tent. I like everything about the design except the foot print is just a little too small for ME for what I want at this point in my life. I understand the Compact Camping Concept. I was a backpacker for many years and still do a bit of canoe camping.
But I'm a big man 6' + 235#s in my 50's now and arthritis is kicking my behind. Still very active but kinda like a bit more comfort these days. I'm not comfortable sleeping cramped in a mummy bag or on the ground anymore unless I have to. I just bought 2 new cool weather rectangular sleeping bags. They are 34" x 80" which is pretty typical of the breed. Some are 34" x 84". I'm also using this as a sleeping pad and it's the best I've ever slept on. It seems to be very popular and on a 80" x 30" cot it's a great match for my new sleeping bags. Almost as nice as my bed at home. Neither really fits in this tent.
http://www.rei.com/product/778153
I'd love for these and my bags to fit in the floor with a little room to spare. Just space enough to get your arms above your head a little and have a place to keep your boots and clothes inside but not on top of the sleeping bag. For those times when you don't want or need the changing room such as occasionally using it for a RTT.
Also many folks sleep on inflatable air beds. A queen sized one is 60" X 80". As your tent doesn't come with a mattress these would be very viable options for the DIYer you've aimed this tent at.
My next thought is I have an M416 and many here do or some copy of one. The outside box dimensions of the trailer are roughly 74" L x 51"W. This gives some room to play with size wise.
For me if this tent was on a foot print of 72" x 96" as opposed to the current 56" x 84" it would open up the comfort factor and options for outfitting for many of us. It would get rid of the need for backpacking pads or custom mattresses.
I do realize that your dimensions fit fine with the typical backpacking standard pad of 20"-24" x 72"-77" and a pair of mummy's.
I actually taped out both dimensions on my basement floor along with some card board for edging and laid out my bags and such in place. I could live with 56"x 84" if I had too. But a few more inches and it would be darn near perfect. I know your design is in production and I'm way late to this thread but as I said just my .02.