I thought it was supposed to be a 7 passenger. I prefer it as it is, 5 passenger in decent comfort and lots of luggage room. I also noticed the rear seat is high enough from the floor so you don't end up with your knees up to your chin.
And comprared to other EV's (E-tron and I-Pace) the Model 3 is relatively trouble free. This one sharing the same powertrain should be the same.