Another great review. I very much appreciate the valuable information you regularly provide to this small niche of the buying public.
One small issue, which I hope has nothing to do with your being smitten (OK, jut falling in love) with this tent: You seem to state as a fact on page 2, "Design and Features," that the floor silnylon fabric is three times more waterproof and four times more tearproof than 'generic' silnylon. This is a pretty extravagant claim, and having spent a lot of time testing and obtaining testing of different silnylons, I have big doubts.
Also wonder whether, if the materials on say, a Hubba were replaced with quality silnylon, there might not be similar weight savings. Somewhat less space, yes.
My latest project for a friend has been to order a Luxe Firefly, which has similar space, good headroom, good venting and is double walled; and because there are elbows at the front and rear apexes, I believe it is feasible to replace the alloy poles with a sturdy and stiff variety of carbon that the design does not require to be bent too much, for a savings of 5-6 ounces. It is a fairly simple job just to replace the poles and elbows. Will also replace the zips with #3 if they are #5, and add a short rear zip for access to the rear vestibule. The mfg. states the fabric is polyester, so it should not stretch so much as nylon. Sensed this was a problem with your Mirage from the picture with the snow. I realize all this is MYOG; but believe it is relevant to thinking about what tentmakers could be doing, especially for top drawer prices.