I'm not an adoptive parent (yet) and I think different people have different attachments to names.
I think security should be the main issue, not embarressment about a certain name. As long as the name is not offensive then I would not mind too much what it was. I do think very unusual spellings are unhelpful. Most very small kids can't spell their own name and so changing a spelling should not be too difficult. It must be horrible to go through life having to spell out or re-pronounce your name because it is so unusual.
If the child is quite young I don't see the problem with changing it. I am just curious how people do it. Do they just start using a new name, or use the old and the new at the same time, explain to the child or ???
I do think maybe I have a more fluid view to names than some other people. I know some people do get quite hung up on names. I know a few people who have names they don't like but stick with them because that is what people call them (and their birth names are different! Adults, I mean who are always called by their middle name).
When in France with a guy called Mike he got very offended that I wanted to call him the French version, which sounds like Michelle! I always changed my name to the version in whatever country I travelled in, I mean introduced myself in the version of my name for that country. So for me names are not quite so fixed, if you see what I mean. People in other cultures also sometimes have this dual idea, both names are very important and have great meanings etc, but also can be changed to a westernised version for simplicity.
Also I know of an adopted child who changed her name herself. I am not sure exactly why she did it.
I would certainly take security as very important, especially with facebook etc. I am sure there must be a good way to explain to a child that they are going to be called something different?
I don't think it makes me think that the child themselves is not valued, or not loved, they are more than a name. But their name is a part of their identity, like their hair style and all kinds of other stuff. So exactly how to tackle it is very difficult and different (I would imagine) for different people.
After the security issues I would say that a child could be offered the choice of a new name, and maybe they would like it. I certainly wanted to change my name as a child!I also couldn't wait to get married and change my horrid old surname. That's not why I got married!!
Sorry am rambling.... if anyone would be willing to say how they changed the name, or if any children later regretted having their name changed, or regretted not having it changed, I would be interested.