Sorry, Narnia, if I have misinterpreted you. You said "I don't see how it's workable really. A lifetime of questions and having to explain." That suggested to me that you were saying the match would not work. Sorry, if I assumed too much.
I totally get you are thinking of your little one when you answer (or rather I know this because you have mentioned them) and I am thinking of my little one.
My logic was that if people were saying this would not work because of the names, then that appears to elevate keeping one's birth name above being well matched. To me a name is not more important then a good match.
Although greenandblackssurvivalkit says "It isn't a good match if it's conditional on a name change for a child of four." I disagree.
I think elevating a name in this way isn't helpful for a child long term. But I also agree with an older child you would need to work together and I would only have attempted to do a name change for our son if it had really felt necessary.
Our son has quite a distinct name and we considered a name change. We considered it as we were not sure about security. We had some fairy conclusive evidence that there really were no security issues and we decided to keep our son's name. It would have felt very strange to change it, and it is not ideal, I did not consider it lightly and would have taken no joy in it, unlike naming our birth daughter where it was just a joyful exercise.
But as a parent we do things for our children, if we can see this will be better for them.
I guess I feel passionately about this because I really do not like or agree with the idea that adopted children have lost everything because of adoption.
The idea we could have lost him and most of all he could have lost us because of his name makes me feel very sad.
Some people are currently waiting a very long time for a match, and I expect some older children are waiting a long time too. My sympathy is with both but for older children the issue is they may not get a match and may grow up 'in care'.
Only the OP can decide what she feels is best for her existing family and for this new child. But I am trying to explain that from my perspective it is not as cut and dried as 'always' keep their name.
No one would ever say that an adopted child should be forced to keep their birth surname. We all acknowledge that adoption means change for all and especially for the child. We do ask kids what they think but my almost four year old really did not want to keep his middle name and social workers convinced us to keep it despite ds's clear dislike. Now, I am glad we did, and as nothing was 'riding' on it, it was a bit of a no-brainer. I had to chose what ds did not want, to keep social workers happy and in the long run to do what was best for ds.
Re "My dd gets worried if people slightly misspell her name - it's not something we should be cavalier about." I'm not suggesting anyone be cavalier I am saying that maybe the name of a child is not as important to all children. You clearly know your own child but none of us, not even the OP, really knows this child.
Children who are adopted lose the close relationship with all the people in their lives, this is of course a massive thing (although realistically many have already lost birth parents significantly through being fostered so not specifically through adoption. It would be the same if they were never adopted although they would retain contact perhaps in a contact centre.
The name thing is not really relevant, name change or not the child won't be going back to birth parents so the real decision is best every match for the child.
Also, children who are adopted do not lose everything and I find that idea unhelpful, IMHO. They retain themselves, their skills, their experiences, their sense of humour, their fears, their facial expressions, their hair and eye colour and a whole lot more. They can also (in some cases) retain some degree of relationship with foster parents (we have, although I know this is not common) and now ds is not too worried about seeing former foster carer, but he knows he can talk to her and see her if he wishes to, he has not lost all of his former life but it is massively changed.