Yes, that makes sense. One more point is that if the reason for v13 giving better performance is extra blocks (which we believe in certain cases can leak till the time Vacuum updates the FSM tree), do you think it makes sense to once test by increasing lockWaiters * 20 limit to may be lockWaiters * 25 or lockWaiters * 30.
I tested COPY 10000 record, by increasing the number of blocks just to find out why we are not as good as V13
with extraBlocks = Min( lockWaiters * 40, 2048) and got below results..