If I was car shopping (I'm not):
I would have loved a metal roof and nice cloth seats.
Add steering wheel with cruise control buttons, and add a stalk for wipers (yeah, I know, not minimalist).
For what I have:
Fix auto-wipers, they suck (I understand the interaction with the front-facing camera, but FFS fix it). No matter the setting, go "down one" when stopped (my 1994 BMW did this, it was a nice touch)
Add lights on when wipers on (as option).
How about a "try it out" one week option for Performance Boost? I'd like to try it, but I'm not paying that much without trying.
And .... Re-cast/re-target "Full Self Driving" as a Level 4 system. Remove auto steer from the existing system.