Hm.... are they trying to cut costs?
I have a similar engine with manual gearbox (so lighter) and the 288mm brake discs and the corresponding carriers as stock.
A friend of mine had the FSIII calipers (1.9 TDI engine) and I sold him my previous GTI kit.
He had to change the calipers, discs, pads, hubs, and the suspension (he had a aftermarket suspension and it was easier to go from 50mm to 55mm).
Not sure the ESP needs recalibrating (if it's possible) to take into account the bigger stopping power.