Sharing a data point.
Was booked on SN501 BRU to JFK on 7/22/23 on a booking made 7/7/23. At the time of booking is was a newer config. On 7/16/23, I got an email informing me we'd had an aircraft change. Flight was now a 2-2-2 configuration of 5 rows. Assuming this is a Eurowings aircraft.
Luckily more alternative award space was released and I grabbed a better timed routing on LH in J on A340-300 out of FRA. Still at 2-2-2 but better times and it seams overall a better product. I also have a hold on an AY HEL to JFK for the day after.