Hava an option that when parked and the temperature is below 40F, automatically raise the wipers up partially. Include Geo-fenced options to exclude home, and/or work.
In cold weather, the wiper blades can become frozen and due to their low position. The windshield defrost is ineffective at melting the ice around them on the Model 3.
The design of the wiper motor/system may make this tricky to implement in software without a hardware change. Another option would be to include the wiper heater similar to the Model S.