Those ones will at least breed true for the lavender gene.And I STILL think he is magnificent. Yes, please work on that NPIP thing, I'd buy eggs. Or chicks, if I thought they would look like him. Unfortunately, EEs don't breed true, sigh...
It's recessive, so if both parents show it, then all chicks will also show it.
As regards the other traits, I can't tell by looking at the pictures of the parents, but hatching the chicks will probably tell quite a bit about how much variation they do (or don't) carry.