Thanks for the reply, I will setup a test receiver and report my findings. Remember that I am providing an install script to build OGN receiver stations (https://github.com/VirusPilot/ogn-pi34) which since last year now also can forward ADSB traffic to the OGN APRS. The ADSB feature is particularly important in the near future for smaller airports in Germany that will switch to be no longer attended but takeoffs and landings still have to be recorded (automatically). So far my dump1090 changes did the job but I would certainly prefer to switch to readsb.
Adaptive burst detection is fast but I had to change a few parameters such that it does the job: EXTRA_OPTIONS="--adaptive-burst-alpha 1 --adaptive-burst-change-delay 1 --adaptive-burst-loud-runlength 1 --adaptive-burst-quiet-runlength 5 --adaptive-range-change-delay 1". Furthermore two gain steps instead of one were necessary, more details here in this thread: Adaptive burst mode - #21 by byraspi.