Calum,

I think we need to credit the PRO with integrity. They are making judgment calls all the time. (courses, conditions, postponements, etc etc). If we think they are out to help specific competitors, we have a different problem and discussion.

Assume the finish time on the last day is fixed for the reasons you say.  The wind dies to the point that RC judges fair racing is not possible, and the result is that fewer races are run than in the schedule? 

How do you feel about that?  It's not an uncommon scenario around here.

On your last point, we wouldn't be slipping in "extra" races. Per my suggested wording, they are explicitly allowed in the schedule. This degree of flexibility would be made clear in the NOR and, as usual, people can decide whether to come or not based on the NOR. 

There were a couple of interesting questions raised above.  
1) If you were to provide advice with AI what would you train it with.   
I would train it first with the rule book, then I would give it the World Sailing Casebook, then I would give it any national authority Appeal books available online (RYA, US Sailing, Sail Canada).  I would probably add written decisions from major regattas with experienced trusted juries (Olympics, Olympic Class World Championships).  If I were training it to write decisions I would give it the Standard Wording document.  I would consider what other resources were available online and use them as well.  One of the reasons that we are behind on this is that not many articles are available online for AI to digest.  In other fields there is a lot more published.  I would consider some of the Sailing World rules articles, some of the articles on the rules in Dave Dellenbaugh's newsletter.  If I were doing it myself I would add my own articles (https://rcyc.ca/Sailing/Racing/Know_Your_Rules)
2) What have you used it for
I have done a quick experiment with this.  I don't know remember whether it was Claude or CoPilot.  I gave it the RRS and the standard wording.  I then gave it the facts founds by a fairly experienced protest committee and asked AI to write the conclusions.  Some parts were correct and in fact did better than the original protest committee.  Some parts need correction.  
I have used AI to help me review NoR and SIs.  For example I have asked "For major regatta's for xyz class do they modify such and such in the NoR"  I have been returned NoRs with and without the modification.  This can be very helpful.
I did try to use it to generate a pairing list for match racing.  It didn't do well at all.  

Rule 89.2 provides the option to change the NoR provided adequate notice is given.

As brought out by John d Farris, any change needs to be communicated to all stakeholders.

I was responding to your question about QR codes.

John,
Thank you for providing the link to the article posted by Graeme Hayward and originally written by Mary Pera.  It is sad that neither of them are with us any more.