Graphs are very small on my laptop screen, but beyond 2,850rpm boost never seems to get anywhere near what the car is requesting (looks about 3psi under on average).
I know some people with N75 valves on 1.8T's had issues with the valve itself, and leaks in the hoses around them where jubilee clips had been overtightened, so my first port of call would be to check there and the DV.