I was wondering about the color scheme, myself. Plinko and the big wheel changed to their current designs before the turntable and doors did. Oh well, the rest of the sets look like a blast from the past.
I don't think the doors are half size -- when I saw the replicas in person, they looked the same size to me. Maybe a tiny bit smaller, but definitely not half. If they were half size, you'd easily be able to touch the light bulbs that run across the top of the frame.
I was surprised they had to truck those two props across the lot rather than just wheel them down the loading ramp. I guess they were too big to risk them on the ramp.