My daughter kept a dozen or so of the golden laced hens.  I still have about 30% of each hatch show up as golden laced so there is no shortage if I chose to develop a golden laced blue egg layer.  I have over 100 chicks hatched so far this year and at least 30 or 40 of them will be golden laced.  Keep in mind that I can use a silver laced rooster on golden laced hens and hatch beautiful silver laced chicks.  The only change I would have to make is to keep a few golden laced roosters and set up a separate breeding pen.
		
		
	 
I think if you are considering marketing the birds as a breed then you should. 2ce the audience. If you have the resources. And why not market them as a breed? I think they'd be very popular. Very pretty birds and blue eggers are popular. You might get a few silver in the gold lines and less line breeding too.
I looked last night at some stuff and realized that the color and pattern I like is actually more similar to the wild type Red Jungle fowl hen. 
https://what-when-how.com/birds/red-junglefowl-birds/  just possibly a bit more gold than most of them. That picture looks more gold than others I've seen, but is pretty common. I think the confusion is my not knowing pattern terminology.
Also read both studies proposing a viral remnant (or damage?) into a certain place in the chicken DNA that could cause blue eggs by increasing bile secretion. I'm assuming you've read them as you know a lot about genetics. I only understand the plain English parts of the studies- so maybe 85%, but it does raise a lot of questions. If true (likely) then might there be a limit to the blueness without harming the chicken? And, if the sequence places in the Chinese vs Machupan chicken lines are just slightly off, would breeding them together enhance things or just make the same sequence's place slightly wonky? & yes, a little impractical as the Chinese ones are not readily available.. Is there a thread here discussing the studies that I could read?
Also, looking at a previous study by the same group of scientists which says the viral insertion is common in chickens and predates domestication in many lines. The difference is in placement of that sequence. Most of them aren't near the place they propose to be the cause of blue eggs. How probable do you think their proposal of that virus's placement being the cause of blue eggs do you think? Personally? I don't think it's 100% odds.
I have too much time on my hands this week, obviously..
EDIT: I think I found the thread discussing this