i have smaller brakes on my TDI and i think they are terrible. Once they go i am definitely getting larger rotors. I do not know why, but for some reason the back brakes fade more quickly than the fronts. VW is a little backwards on this one.
I did the 312mm GTI swap on my TDI and it is night and day different, I wish I did it sooner, especially since it's so cheap to do.