Have the fixed the problem where if the battery fully discharges, the car becomes a worthless brick?
Yes, that one’s fixed. Not the most elegant fix tho’... the controlling software will now shut down the car if the battery charge falls too low. So you have a useless brick until you can get it charged up. It does give a warning prior to shutdown to give you time to hopefully get to a place where you can charge it.
No, it starts out as a worthless brick. The battery problem is just frosting on the brick.