Dear Stacyadoopt,
I think that for many adoptees, somehow keeping a connection to their birth name does matter. Like women pondering whether to keep their maiden name, one's name is key to one's identity, sense of belonging and pride.
There's a similar thread about this issue
Names According to the book, Adoption Parenting
Adoption Parenting - Creating a Toolbox, Building Connections there was the suggestion from an adoptee, "please don't erase my birth name, that's all that my birth mother had left to give me".