I would like to thank all of those who responded over the past 10 days to my post.  Clearly there is an interest in the system and we as Judges need to embrace it and be educated as to how best to use it.  Clearly there is a difference as to various systems, but what I am referring to currently is the Vakaros with Race Sense utilizing the Helio.  The J111, J24, J70, Melges 15 and J105 (and others) have been using it with success for the past few years.  As more and more events will be using this I feel that the Judges need to be educated as to it's functionality.
I see it used routinely in the protest room to settle differences between the Protestee and Protestor and it's use added to the Protest checklist.
In order to do this I will set up 2 Judges roundtables this winter, to educate those who have not worked with the system and to sharpen the understanding of the judges as to the use of the technology.  I hope to get some educational materials to be reviewed before the roundtable, and a judge like John Porter to lead the discussion.  
My thought is to have the Protestor/Protestee testify and then if the PC feels more information is needed then the Tracking information (prepared by the OA for viewing) presented.  If we are to use this data we need someone other than the PC/Parties to present it so as not to burden the PC with displaying technology they may not be familiar with.  Much of that will be up to the Judges Committee and they can discuss it at their annual meeting in February.
More people will be using it in the future and many classes have invested $6,00-$10,000 in technology to make this happen.  I think we as judges need to move forward with our customers providing good quality protest decisions.  Any suggestions please forward them to me.
Doc

This one is worth answering directly, because you and the app agree and it wasn't letting you see that.

The rule 14 card only ever proposes one move — you hold your course — and asks whether holding it is legal. So on a card where the answer is "that's a foul", the app is saying exactly what you were saying: swift and decisive action was required and holding on wasn't good enough. It just never gave you the words for it, and it never told you that contact was actually coming, which left "surely she'll get out of the way" as a perfectly reasonable read of the picture.

The card now says so in the setup: she is not keeping clear, and you are going to hit her. What's left to judge is the rules question — rule 14's first sentence binds both boats all the time, so the interesting half is the second: a right-of-way boat need not act until it is clear the other one isn't keeping clear. When that stops being true is a real question, and it's the one the card is trying to ask.

Clearly placed there by a trimmer trying to share the guilt! ;0))

Thanks very much John. I appreciate your efforts in replying in so much detail.

Our annual program includes a Pointscore Series (Pursuit format; scratch -> biased towards slower boats) run every fortnight ( 15 races per season), Championship (Yardsticks; 2 races each day; 14 per season) and Sprints (Yardstick, 3-5 races per day; 24 say races per season) => run in turn every other week.  (so C-P-S-P each month).
 
We'll be running our annual October Regatta (6 Divisions) , Hobie States, Spiral Nationals + the International Canoe World Titles this year so we'll be busy, and having lots of fun and enjoyable times out on the Bay!

As Race Secretary I want to apply a common entrant list and a common set of rules for our club races. (KISS).  We are transitioning from a Cox-Sprague system to low-point (Sailres) next season. We have a meeting next week to decide on the rules.

After much research and simulations and yours, and others kind feedback, my preferred approach is DNC= Starters+4. I thinks the committee could settle on DNC = [12] which is starters + 4 for our average fleet size of 8-10. There is a group who want to keep the regatta approach of Entrants + 1.
 
We'll see who 'wins' the debate. Interesting Times (pun intended)! 

Cheers and Thanks again for all the great feedback. 
PS many clubs face similar issues and so it is worth discussing it here.

Looks like several scoring systems allow for it.  You will find the instructions for how to do it on RacingRulesOfSailing.org here.