Range mode in my opinion is totally useless. In really cold weather you'd be lucky to get an extra 2% range coupled with the fact you would've less heat. Not worth it.
You could also use "Chill" mode but that too would only gain you a minute savings in cold weather. Better to preplan and use available charging.
I agree for the most part. I would only turn it on in extreme weather if the car was stone cold and I was pushing the range.