When I put in neutral during rolling on the road, TC is going, and going, no any resistance in brakes.
Gearbox is manual, and I think that engine braking is to weak when you let go gas pedal.
I'v got also Passat 1,9 TDI and brakes are fine, also, no any resistance when it is in neutral, but, when you move foot from gas pedal, the car start to loose speed very quickly.
You can almost stop the car completly only with engine, without using foot brake.
I think that maybe the problem is in preety heavy TC with combination of week engine braking when you move foot from gas pedal.
My friend also have similar TC with heavy load inside, and he also noticed simmiliar thing. Max 20000 km with one pads in front.