The reason I ask is because I have a similar sensation with my Bluefin'd petrol car. It produces roughly equal torque to yours & I don't boot it regularly, but when I plant my foot in "D" I get a slight rise in revs before kickdown & the car moves on! It's a more instant reaction in "S" mode, which feels like it has a more aggressive clutch bite.
I put it down to the stock DSG software taking its own sweet lazy time to react for a smoother & more relaxed gear change, and I can certainly identify with what Alex posted about clamping pressures above. Even for Manual mode, it makes total sense that the software would limit certain parameters differently in different driving modes.
Have you tried it in S mode to see if the bite improves? at least then you can maybe get an idea if the clutch still has any ...erm ...teeth left.