The law about execution for making contact with the god was real though, if I remember correctly, that wasnt a ruse. So at that point, what choice does she have? Of course, for such an old deity, she should have done differently. Kill the antagonist on the spot for example, or fight for Casio's innocence in front of the authorities that handle stuff like this, but this wasnt a dumb cow being incredibly stupid, like in a lot of ntr. The demon talking actually meant Casio's death.
The butler shit I didnt like either, but it's not so bad as to ruin it.
And the personality part, I dunno. I felt a lot of conflict in his mind whenever things would go bad, maybe that was projecting, but I never felt he was a blank canvas. Noah was definetly an improvement, but sometimes and MC being silent makes you pay more attention to his actions, infer what he said and his attitude based on the other's reactions. I liked both Noah and Casio as characters, not as self inserts I think.