Well, it’s not a feminist choice!
But then youve defined a feminist in accordance with your own feminist image.
But it's not a feminist choice! Just because lots of women do things, doesn't make it a feminist choice.
Most feminists do the best they can within the parameters of patriarchy, and most feminists recognise that every single hill cannot be the one they choose to die upon, but really... renaming yourself as your husband is not bloody feminist! Do it if you want, doesn't bother me, but don't do it and claim it as a feminist act.