So I no longer have the option to pay the latinum to get the Deferi slaves. I was just curious if there were other unannounced changes to this mission, ie a more diplomatic solution by appealing to the Breen. I would test it myself, but would rather not have to wait 24 hours after failing it to get the missed diplomacy experience.
Yes, for Fed characters there is an option to resolve it "peacefully" and get the diplo exp. Heck, after you beam them over, you can then provoke the Breen and fight them and you still get the diplo for rescuing the captives.