Just two small points:
1, Over the years, the Nationals - the only AMA conducted contest we're concerned about - has allowed some"adjustments" to simply-read rule book wording. F'rinstance, appearance judging immediately before a contestant's first flight would make the schedule run impossibly long, AND the judging could not be consistent over the day. The sheer number of contestants expected - and usually present - is an excellent reason for the same-time, all together judging that has worked well for so long.
2,The large number of entries has also 'allowed' flight scheduling variations. Can you imagine the mess otherwise, if only one day, on one circle were required, No, the rule book doesn't say that specifically, but it also does not say there will be so and so many circles, or that fliers will be rotate through them so that each flies before all the judges. "Seeding" also helps balance the entry around the circles. (It is also an argue starter, quite often, but consider a fairly new guy who is outstanding and 'peaking' at this Nats. If he wound up on a circle with too many top expert, several time winners, his placing can be unfairly affected. This could also 'crowd out' from advancing a current top guy if too many such are on his circle.
These things have been developed - and argued about - over many years. What we have now works, and the judges are allowed to do well in a humanly practical situation. The organizers, judges scorekeepers, and the other support people have a grueling job. Thank them occasionally, okay...?