@marvel6
Yes it's a tough spot to be in indeed. The "born prior to June 15, 1981" means that DACA was extended to people who came here before age of 16 but were older than 31 at the time of DACA making them ineligible. Now with the new rule in place individuals who came here before age of 16 and are over age of 31 can also apply for DACA. Hope that makes it clear.
So that still is of no help to your Mrs and myself. As far as the ban goes i'd think that if she was entering as UK citizen then the ban would be waived, plus there's even an waiver application that you can try to submitt to get the ban lifted.
Good luck with everything