I'm running mine with a similar output with no problems. I have heard that some DSG boxes are coping with somewhat larger power and, more importantly torque outputs. It's the torque that is close to the limit , as the DSG copes with a lot more power with the 3.2 litre petrol engines.
What actually happens when the limit is reached, I don't know for sure. Standard quoted figures for the FR would not be an issue, but VAG have a habit of under rating the output of their TDis, plus tuning options might go beyond the factor of safety that they must build in.