The fact that the name change to Skywalker from Starkiller took place isn’t news, but the fact that the change led to reshoots isn’t as widely known.
The fact is that the last name Skywalker isn’t actually spoken all that much, so the fact that the change took place in the middle of shooting wouldn’t have had a major impact on the production.
Of course, as one fan points out on Twitter, it also means that there’s a potentially large portion of the finished film that Mark Hamill may have shot believing his character was named Luke Starkiller, it’s just that the name doesn’t come up.