If the above process (a legacy relationship) could be entered by re-affirmation of wedding vows, couples would not be breaking their vows and this is key to many. The relationship in all important respects could continue. There would be no need to publicly identify as lesbian when one is not. The State would incur God's wrath by casting the relationship asunder!
Now that case law has established that the sexual orientation of a civil partnerhip is not heterosexual, it seems that there is a lot of discrimination going on against trans folk, on the basis of their sexual orientation. This is about to poduce a number of legal challenges. Why can't the government at last do something to improve the miserable treatment that trans people have generally and married trans couples in particular? You do not ask black people to divorce to obtain human rights do you? The solution noted above would preserve marriage between a male and female and religious feelings thus unoffended.