I'll put off starting the incubation for a few extra days. The granulated soy lecithin likely will have an effect on egg passage through the hen which may then be more rounded.
Back in the early to mid-1980's when a subscription to the journal SCIENCE was affordable, there was a research article on the effects of a daily 3 tablespoon dose on primate alcoholic fatty liver disease. Two groups of primates, one fed a diet mostly comprised of calories from alcohol and another with the same diet but with granulated soybean lecithin daily. A couple of years and the animals had liver biopsies. Stark difference, distorted fatty liver cells versus normal liver cells.
So in fatty liver disease the fat becomes built up in the liver while in a healthy liver I think it's fed over to the gall bladder and used in the production of digestive enzymes. With the fat more bio-actively available there should be an effect on egg passage.
This may be an early indication of round versus pointed egg gender tendencies. Someone with pure sex-linked birds would be able to tell much more quickly than I of course.