Having to create a joint salutation for spouses is redundant data entry. I have used systems that will allow queries and reports to join spouses on the fly based on business rules set up in the table maintenance. Having to create additional joint salutations is time consuming and increases the chance for errors exponentially.
There are no plans to change the way couples are handled in eTapestry. To save time when creating the Joint persona, you can copy the Primary persona on the Head of Household account and then edit the salutations.