MitD doesn't eat babies. And "at least" argument doesn't change the fact that Belkie kills people for fun. And O-Chul knows that. Anyway O-Chul strikes me as more flexible than other Paladins, so maybe that wouldn't be so much of a problem.
It's 66 years ago. OOTS considered that Girard could still be alive, which they wouldn't if it was ~100 ago. And Xykon is around Dorukan's age. Halflings live longer than humans, although I'm not sure how much longer. I guess she would be around Tarquin's age in halfling years.