Thanks for your input guys!
I was also considering copying the ignition maps since they are already calibrated to the raised boost profile (at least to 190% load). But I do not know if that would be wise since my engine has a little higher compression.
The issue with MED9.1 is that it is not very straight forward to log the PID components. The only option that I have seen until now requires injection of custom assembler code and changing the definition files in VCDS.