I really like your driving mechanics, the steering looks fluid and fun, nice to see motion controller direct input for that finally.
I had thoughts of a system allowing players to sit on the floor in order to “enter” a vehicle to remove the need for props but I guess that wouldn’t work for everyone. A “tracked” chair is the first obvious solution but requiring props that may move or be in the way of normal gameplay (wall to wall tracked space) isn’t ideal.
Another alternative would be standing driving, but I haven’t had time to try any of it yet.
Good luck, I like your progress.