I see no reason to turn the A/C (snowflake) off. The car will determine whether it is needed or not. The dehumidification function is useful in my climate. I also leave it in auto mode at all times.

However, I do find I need to fool around with the climate program settings way more than I should. If I don't do this, it will either be too hot or too cold depending on the outside weather, regardless of what temp is set.