I should have been more clever to figure this out earlier, my then new DPF would be thankful.
From my recent observation, the swirl flaps are an absolute must have for city driving. Not so much for somebody who does long highway driving - in open position they might act as a sort of small blockage to the airflow.
Now after a good regen, the soot rises more evenly. I even get city drives when soot does not rise past 10g for 20km. After a shorter or slower (speed) regen it goes rather quickly to 20g, but that seems understandable. It still settles for a while around 20g, then for a longer period around 30g, and then again for a shorter time around 40g. Triggering a regen at 50g.
Have you been playing with Carly? I am looking for advice if there is a parameter that might show something about the state of the injectors...