I don't know.. To me changing my name upon marriage has been a clear choice (I like DH's name more than my foreign, bland yet difficult to pronounce and spell one, also I wanted us all to have the same name, but loathe the idea of making a name up). I don't think we should be berating women who do it, any more than we berate women who have chosen to be SAHM or wear make-up. These all are choices.
I have educated myself to a very high level and could be the main breadwinner should I need/want to be. Similarly DH would be happy to take the role of SAHD. Right now, as a team, we are better off with me at home and DH at work. As soon as DS goes to school, I will be going back to Uni for some more studying and then a job.
I appreciate I might have had a different experience than most, as I come from families with a veeeery long feminist backgrounds, from main breadwinner female inn keepers in 1800s and nurses in 1930s, to fathers in the 1960s in highly patriarchal countries making sure that their daughters can wear trousers, travel the world, go to uni, and be entrepreneurs should they wish to, and my DF supporting my DM while she did her PhD (he "only" has a MSc).
As a consequence, I feel matters such as sexual harassment, equal pay and the glass ceiling are more important to talk about than names. A name to me is the same wearing a skirt, make-up, or SAHM. All valid choices, as long as you DO know they are choices, and I find it hard to believe that there would be many women In Britain today who didn't know it..