the most important pilot action is to apply carb heat at the first sign of icing. Adjusting the mixture is much less important than getting that heat on early. I am distressed that there is still a constant drip drip drip of accidents where pilots let carb ice develop to such and extent that the engine stops.
Very true.
It would seem to me that blowing 62F air on the frosted parts of the carb would be more than enough to melt the obstruction quickly.
The 62F carb heat air I had was only 20 degrees warmer than ambient. Or, if I also lean, 30 degrees (F) warmer. If you've foolishly accumulated so much carb ice that you cannot maintain cruising power, you're headed down. Deicing in a hurry might be necessary, the extra 10 degrees F is going to be pretty welcomed then!