Depends if the car is stock or not, the Mk7 (S38V) has the DSG so much more sorted than the Mk6 but if the car is tuned yes you will need it done if only to skirt around torque limits in the box. That aside the shift points still aren't quite right either erring on the economy side just not as woeful as the mk6, so its still worthwhile. The thing about a DSG remap is that you are using it all the time vs an ECU tune where its only when you have the opportunity to do so.