I'm just very surprised that the issue was not solved at source. Given the emphasis on short turnarounds and on-time departures, it came as quite a surprise that the airline was willing to waste fifteen minutes of cabin crew time to sort out the multiple seating issues caused by a poor seating allocation algorithm.
As this was a full flight to a holiday destination, there were eight or nine families that needed cabin crew intervention to get them seated with the right number of children next to adults, and the right number of infant-in-arms in the rows. Perhaps I had too high an expectation of the systems integration.