Give it to everyone who applied...
...then change top tier from Diamond to another name "Red Diamond" with the same qualification requirements. Then you have a 4 tiers:
Platinum (save qualifications as always and same benefits)
Diamond (no qualifications necessary for Credit Card Holders) - benefits devalued to be the same as Platinum, plus these accounts will be marked as people that hold Hyatt to a mistake, therefore they will also be held to any mistake they make. Accidentally book the wrong night on a non-canellable reservation - too bad, no wavers/no favors. Additionally these members will be offered the least desirable room available at time of check-in, no check-in before the guaranteed check-in time of the day, etc.
Red Diamond (same qualification as current Diamond Status and same benefits)
Basically I'm saying Hyatt treat people really well at all levels and I think they have one of the best programs and products - can't we ever cut any corporation a break, we certainly always seem to ask for exceptions for us.