Is the Buff Laced also a Brahma?.
Let's say they are Brahma. Buff Laced are Dominant White and Gold Partridge based Laced patter. So(you can enter this on the Chicken calculator). eb/eb, Co/Co, Pg/Pg, Ml/Ml, s+/s+, I/I and Lav+/Lav+
Isabel Brahma are just Lavender diluted Gold Partridge eb/eb...
Looks pretty Birchen(ER) to me, he is ER/e+, I have yet to find a E/e+ that looks Birchen, most of them look pretty solid black or really dark Birchen(no red/golden/Silver Shoulders).
Does Darcy looks barred to you? I can't see it on the pictures you posted. Barring is one of those genes that if you don't see it it's because it's not there. Unless for all white birds that can hide Barring and multiple other genes.
Darcy is to barred so none of his progeny show Barring. Darcy Is heterozygous for the Extended Black e allele and the Wheaten allele, exactly the same as the blackstars. 25% should be solid black(homozygousExtendedBlac), 50% leaky blacks(Heterozygoous Extended Black) and 25% Wheaten(Yellow chick...
Opal Legbars are Just cream legbars with recessive white. All chicks will hatch with a headspot due to single barring and they 50% will be black with headspot that grow to be Dark Golden cuckoo like in color and 50% will hatch blue with a headspot that will grow to be Blue Dark Golden in color
The white Satin is actually silver partridge with dominant white, making her all white, when crossed with a gold based rooster(Paint and black can hid gold) will produce female chicks that can leak color.