If her genes continue coming through there shouldn't be any problems, but anyone that has done color breeding projects knows how complex some of it can be.
I guess just poor quality mottling to start with. Usually with mottled birds it shows up as juveniles, almost disappears and in the first or second adult molt it comes back. I have a hen that was solid black for three years, but produced mottled chicks. Last fall when she molted some white...
You had mentioned keeping the black colored laced ones so you can see the mottling better, I agree with that choice. Perhaps when the mottling is established properly you can play with the blue color.
They look good, for now. It just seems like the first pictured cockerel should keep some of that mottling. You must be in kind of a suspense right now on whether they'll keep it.