In your circumstance I would suggest Always Low, then set a geofenced High for your home. The small distance of wear from the High section compared to the lower wear from Low everywhere else should get you the best possible wear, I suspect.
Perhaps, but I'd prefer to see how the redesigned assembly works before taking that step.
As an engineer, I find the notion of a drivetrain "shuddering" itself apart under load to be rather disturbing. Other car companies have produced variable-height suspensions that overcame these problems, and I think we should hold Tesla to similar standards. It does Tesla a disservice by giving them a "pass" on this kind of design flaw. I love the technology and fully support the direction, and I have nothing but superlatives for the way the vehicle drives - but creating workarounds for design mistakes doesn't help improve the vehicle.
Hopefully, they have learned from the mistakes and feedback, and the redesigned setup will resolve the problem