Just thought I'd put my two cents in on medved's post:
Since you are from the north get ready for Large Drop in Charge When Parked in the Cold,
I haven't seen evidence for this with the current firmware.
No "snow driving mode" raising the car at speed higher than 5mph and lower traction control action at very low speed
Traction control does need some tweaks. That said better snow tires will probably solve this problem - the standard Pirellis drive like all seasons. Option to drive while the car is raised a little would be nice.
Major fogging in the rear window
Huh? Non-issue - no better or worse than any other car I've ever driven. It has a very effective defogger, and unlike many cars I've owned, once defogged it tends to stay defogged.
Side windows fogging and frosting => no side window vent/wrong design
Yes this is an issue. The windshield is annoying but not dangerous. The side window is an issue but easily fixed for now with a hand scraper. Only happens in severely humid and cold conditions (i.e. snowstorm).
Frozen charger door that can't open/gets stuck
Minor and easily pried open with a fingernail. Tip: If you bang on the back of the door with your closed fist it will pop open.
Frozen/Door window with ice that don't close properly / without potentially breaking the door/window
Haven't had this happen.
110V outlet can't keep the charge and pack warm
That's what I use my 110V outlet for. The car doesn't keep the pack warm when not charging though, but this can be fixed in firmware (like it was for the Roadster some time ago). For now I work around this by deliberately parking with the pack not full and plugging into 110V for the night.
SoC dropping badly in cold climate (30 miles a day vs 2 in normal temp)
Repeat of earlier point - haven't seen this.
Wipers that can't retract
Haven't had a problem so far.
MPGe double than EPA estimates: 400-450 wh/km (640-700 wh/mi) vs 200 (308)
This is wrong. IF the pack is
completely cold soaked it does take this much power
at first. This is due to the battery heater in operation. Once the pack warms up the Wh/km drop to the 250 range when driving at 90 kph with moderate cabin heat. Easily resolved by charging before you leave. See 110V trick above.