Glad you brought this up - I didn't see it before.
If you are thinking that the match to 100% gold Leghorn should depict Crele Legbar - then it is a gold Legbar plus crest and blue eggs...... It seems to me that not everyone wants to go that gold...but it is an option of course.... We would then just copy the Gold Legbar UK standard in its entirety and add crest and blue eggs to that SOP, then translate the wording to APA lingo.
Spot on about the ease of writing the coloration of the White recessive--- providing that 1. The autosexing will continue for many generations and 2. Enough people have an interest.
I see Crele as not Gold Legbar Gold, but rather the Legbars that were kicked out of Legbar land and their owners told they were "mutts" due to coloration......Would you expect the brown (gold) wing triangle show in the diagram on the new variety? If the ones on the chart that are in the bottom row are 'true Cream' - - and the Rees line at GFF is toward the ideal CL, then perhaps the middle row is Crele.
Jill Rees line is on the the Cream Legbar Club Website - History of the CL in the USA as well as on Greenfire Farms website.
People who didn't want to have that exact Rees line look and had invested themselves in Cream Legbars were the beginning of the push-back.
With the recent UK winner - it seems that the CLs are a bit moderated from the ones that looked like as someone once said 'a substandard BPR' - I guess that was 'touche' for having their own CLs called mutts. LOL -- all in good humor mind you.
This also brings up two points to ponder.... 1. Not everone's ideal CL will be THE standard...the idea of Crele is to expand the gene pool pretty dramatically IMO and still retain the original look that is so distinctive for a Cream Legbar- 2. What about the chickens that are truly boarder-line regarding such things as secondaries... Returns to the question posed at the State Fair "how much chestnut (referring to the 'some chestnut allowed') is allowable before the judge will start to deduct points...there are some areas that are (pardon my pun) shades of gray.
I don't like the color of the gold legbar male but the hen color is similar to what I am seeing. Another thing to consider is if people would want matching saddle and hackle.
About the various shades inbetween and such- if we all decide on a specific look like the 50% pair as what we all like, then we need to come up with wording for it so we can breed towards it. The birds that are in the border region as you said would end up as culls because people should breed to a standard in one way or another. The variety has to be different enough so (not to be mean) if we start planning the proposed standard that is more washed out looking, we'll be wasting our time when it comes up for APA acceptance.
One thing I would like to see if others agree on is the darker wingbow on males. Not mahogany color but maybe matching the orange saddle color.