I'd probably like balanced if it had an option to never discharge the Powerwall during off-peak hours.This will be highly dependent on house load during peak and the PV size. For my own personal situation, during the winter I encounter only 2 days where my PWs did not fully charge before Peak.
This should be the AI learned function that is Balanced. Understanding your house load during peak plus the expected weather and PV generation. My sprinkler system knows the weather and adjusts the watering timer, big data Tesla should be able to do the same.