I think this is a great idea! Too bad I live so far away, otherwise I would like to assist and participate. From descriptions of other tastings, it seems you have a good method outlined here for Jackfruit tasting as well. It think the idea of photographing the fruit/trees and weighing the fruit is also good because these variables are important. Some of these criteria are difficult to assess unless you grew the fruit yourself or were the one cleaning the fruit, so photographs would be invaluable.
Since I am a beginner regarding jackfruit growing, I used a resource to evaluate some of the more common varieties available in Florida. I am sure you are already familiar with the Growables website at
http://www.growables.org/information/TropicalFruit/jackfruitvarieties.htm, also the USDA link that is on that page is useful for descriptions of some features about the trees and fruit.
The Growables resource and table of information have a few categories that you may want to consider adding to the judging criteria. They list flat spines at ripening (yes/no), percent edible flesh, flesh easily removed (maybe this would be part of the ease of cleaning category), flesh thin walled/thick walled, and rag edible.
These are just a few items I thought you may want to consider, and hope you find them useful. I hope you keep us all updated on your progress and results from taste tests. Florida is decades ahead of California regarding Jackfruit growing, but I hope with sharing knowledge and expertise that we could get enough growers here to emulate what you are doing and have some jackfruit tastings here too. I wish you great success in your endeavor!
Bob