Le Pin,
My understanding of Maestro is that it is designed to optimise the landing sequence using the arrivals part of it, and it keeps recalculating etc etc, a bit like my Garmin.
My understanding is that the distance of 200nm from destination is user defined, rather than system specific? I did ask btw about our sequence on taxi in, no preceding arrivals for 6 or 7 minutes, no departures for 4 minutes, so I was and still am bit baffled.