I live on the south shore of Montreal, pretty much near you I guess.
I have not had any ice on the inside the windshield since I've had it.
As for air pressure, you're just way too low and that's why your sensors complain, I think they start complaining at about 26 PSI if I remember well. It happend to me once because of a tire that got punctured by a nail and was slowly deflating on the highway.
You need to have 32 psi or 220 kpa in your tires before driving (when you drive, the pressure goes higher and it is normal). That's the recommend pressure for your tires on the Compass. Even with the temperature varations we had here recently my tire sensors never complained even once.
Brake noise... I've not had any problems with that. However, many people think that their brakes are noisy but it is because of the ABS engaging when braking in snowy or icy conditions. Might be your case, might be not. When the ABS engage, it is very noisy ad you feel a lot of vibration in the brake pedal and in the truck overall, and it is very normal that this happens. If this vibration/noise also happens when you brake on dry/wet road and that the ABS don't engage, this is abnormal.
As for mileage, I do have to say that I am not very impressed with it, but again, I'm an agressive driver and it shows on the mileage. I would be very glad to have 10 or 20 liters more in the tank. For now, I fill it up completely every 300-350 kilometers.
As for the remote key lock/unlock thing... I posted this as a problem in another post and I finally had my first oil change this week and reported this problem. Chrylser knows there is an intermittent problem that sometimes happens when you get out of the vehicle and are unable to use lock/unlock from your remote control. They have this problem on Compass, Calibers and Wrangler for now. They are trying to figure this one out but they think it might have something to do with the remote starter, but again, they are not sure yet. The only way around for now is to get back in the vehicle, start the engine for 2 ou 3 seconds then get out again and you should now be able to lock/unlock the vehicle with your remote key fob.
As for the CVT I don't quite share your opinion. I agree that this transmission is something to get used to but it performs very well. I did notice though that when it is very cold outside, the few first minutes of driving seems to be hard on the transmission. But I had a Chevrolet Venture before and it was the same. Automatic transmissions are like that it seems. That's heavy oil there and when it is cold it reacts slowly, but usually it comes back to normal within a couple of minutes of driving and shifting. Don't ask me why but engaging manually engaging 4x4 on those days helped me, maybe rear differential was having a hard too. It too has oil so having it forced to roll but engaging 4x4 mode instead of being "dragged" by the front wheels seems to help. Again, very cold days only and I do believe it is normal behavior until the oil warms up.
I also asked about this brake recall yesterday on my first oil change and they don't know anything about it, the technician checked every notice they had for this truck one by one and hasn't found any recall regarding brakes.
Too bad you don't like your Compass, maybe you can try the Patriot when it comes out, it is bigger, trail rated and cheaper and it is based on the same frame as the Compass/Caliber.
2007 Jeep Compass Sport 4x4
Steel Blue, 26E, CVT, Boston Acoustics, Sec. grp.
Heated seats, Driver's convenience grp.