This would be some sort of change for living Notables only?
And I'm still not sure where this statement fits in.
Currently WikiTrees Privacy and Marriage Policies do not allow living spouses of living members and non-members to be restricted insofar as the public display of the relationships of the living nuclear family members.
My interpretation of your statement is: current policies allow living spouses of living members and non members to be publicly displayed.
Because as you said; current policies do not allow the relationships between living spouses of living members and non members to be restricted as the public display of the relationships.
Relationships between living family members such as spouses, children and other family members are not public unless the person profiled is a WT member. And profiles for children are always restricted.
Personally I do not have an objection to such people as the Clintons or King Charles and his wife Camilla and other similar people having a spouse or other family members shown on their profile as connected rather than just mentioned as spouses or family members in the biography.
What I am questioning is the use of the bolded statement above as a basis for change.
How will the creation process for profiles of living Notables be changed to allow only those living Notables to have living Notable spouses connected?
I'm not being deliberately difficult I just want a better explanation of how this would be implemented.