I am fine with the ending, really you saved the world who cares what happens to mayrina or the other minor characters, just make up some head cannon. And if we got long winded explanations about what the characters do afterwards it will all be contradicted by the next game or dlc. Maybe it could do with an end of game party with you companions or something, but unless the is the last bg content ever made I don't think there has to be a half hour of endgame slides.