I like the idea and I appreciate your argument about equality but I do not see it as a long term solution. Now your children will have one of your names or both? Is it equal to get only one of the names? And if they get both your last names and they use this same idea when they marry, they will have like 4–5 names?
What do you think about the (hypothetical) idea of you and your husband keeping your last name as middle name and getting a new family name for both?