Having used the 2R for many years, I have found the wind stabilizers to be unnecessary in any forested camp site. I have been through some pretty bad storms (+80mph registered at the local airport, well, a field actually), a tornado (with trees crashing down not far from where we camped) and several down bursts. It stood up well with no damage, and, no wind stabilizers. Easily, the winds exceeded the 40mph you mention.
Staking is not a huge problem either. The one stake at the foot end seems very impractical, but the angle of the shorter roof out to the stake is very low. Most of the stress is across the ground, not pulling up. It is easily possible to angle the stake to a 90 degree angle to that stress and plant it that way. I use 4 .2oz shepherds hooks with this tent. Two are sometimes planted in the rear on softer ground (loam & forest duff) but generally I only use one. It has never come down.
The quality of the seaming really worried me. I was used to felled seams, especially along the ridge. After seam sealing, though, they have not opened up. They remain well sealed. They do look messy as hell, though, functionally, they work.
The ventilation IS a problem above freezing to around 40-50F (around 8-12C.) Condensation is BAD with this tent. It has one top vent and two low vents. We also have the "windows" on the sides. In cooler weather, we crack the windows for a 6" vent along each side. It seems to help a little. But generally, after two or three days of rain, our gear is damp. No the tent does not leak, and protects against the rain. But in long periods of rain, everything gets damp much faster than in the Exped Sirius (to remain within the same class of tent.) I suspect the small volume lets condensation occur as the air is being vented out due to the high humidity of having two people in the tent. I suspect it will be a bit worse in the 2c. The liner only masks this since condensation usually occurs, mostly, on the outside layer.
Warmth goes down with ventilation. Unlike the Sirius, with it's 2 top vents, we don't stay very warm. I doubt there is more than 5-6 degrees differential between inside and outside air. With the 6" side vents open, the top vent, and the two low vents, we do get enough air change to reduce overall humidity, if not condesation, but that means a loss of heat in the tent, too. In the 32F/0c to 45F/~10C temp range, we never bring this tent, opting for the heavier Exped. Colder or warmer, weight trumps the condensation and we bring it...