I think the combination of small reversing lights and rear tints isn't a great combination for reversing in the dark, especially for anyone who's opted for the 90% tints.
I find in my car (Polo GTI) that the reversing camera helps. It's positioned just above the number plate so at night, the image from the camera benefits from the LED number plate lights illuminating the ground behind the car, so the image on the infotainment screen is quite well lit.
On the mk7 / 7.5 Golf, with the position of the reversing camera being behind the tailgate handle (so further away from the number plate and higher up from the road), I don't know if the number plate lights would provide a similar light enhancement to the camera image. Perhaps someone with a reversing camera could provide an insight?