Rose/flat combs & brown highlights on Blue Orp Roo

[HenHacienda]

Hi there,
I'm hoping someone can give a little detail about f Orpington's and Rose combs. I hatched some eggs several months back (purchased on Ebay) They were black orps. One the the Hens has a flat comb (rose) From what I read years ago then did. But is this a "no no" now a days?

Also, what/why causes brown feathering to appear on a Blue Eng. Roo? I've read that is will come out at first molt, but no sure?
What's the scoop?

Any info would be great!

Thanks

 

[alibra]

Rose comb? I suspect Wyandotte grandparents.