As the mom of 4 beautiful AA children adopted transracially...
It's sometimes hard to not analyze every aspect of an adoption and its effect on our existing family.
In alot of ways it is a good thing to do so that we are sure of what we desire and can handle.
IMO if you desire to adopt a child transracially, then do it. Your children will view your family as beautiful just as long as it was something you celebrated and welcomed.
My advice though is to not adopt a biracial AA/whatever if you are not equally as open to full AA. It is simply not fair to the child IMO. A biracial child will be looked at as AA by society and certainly won't be immune to racism.