Here are a couple examples of incomplete lacing: https://www.backyardchickens.com/threads/rhode-island-red-hen-x-gold-laced-wyandotte-roo.349906/post-18042126
https://www.chickenforum.com/posts/122934/
I would focus on barring and lacing first since your birds don’t have mottling. Crossing one of the barred offspring back to a Wyandotte should give you 50% barred chicks, and more laced/incomplete laced patterns than you’re seeing now.
I can see damaged feathers in the pictures, the feathers there do have a downy part, which is what you’re seeing since the top part of the feather is gone
None of the birds in the pictures are chocolate, the tan hue could be sun-bleaching or gold leakage (which is straw-colored on a lavender chicken). The chicks aren’t laced, they have buff leakage from the buff hens
His lighter barring isn’t because he’s a marans or Dominique cross, it’s because he has the blue gene (he’s blue barred), though I agree that he could be a marans mix
The left hen is lavender, the hen on the right is lavender mottled. Lavender (and mottling) are recessive, so lavenders will produce solid black chicks when crossed to a solid black chicken.
I agree that he doesn’t look splash. Not completely sure if he’s silver columbian though? @Charityschmidt38 does the rooster have any other offspring?
The pullet could be blue carrying some genes for partridge
Opal and lavender are two separate things— lavender is a simple recessive gene that dilutes a chicken’s coloration, opal is a combination of gold duckwing, barring, and lavender. Opal legbars are probably also supposed to have the cream gene, but I’m not sure how much that impacts their...