The assasin trait wasn't my idea, it is already implemented in the game. And when you look in the todo list, there is already mentioned that it is planned that girls with this trait will be able to go on assasination missions.
My idea was more to make this sytem you need a trait for a special job more global. I was mostly looking at the jobs that are planned for the girls and thought oh my god a big list, and every job needs other stats for succeding?, that is getting in the long run quite complex.
And i think my idea wouldn't complicate things, on contrary it would make it easier for the player. With this the player musn't look every time he puts a girl on job, if her stats are good enough. If she has the trait, he knows that she can atleast do alittle in the job, the traits are only accesible if the needed stats are at a special level, and the girls who aren't worth even trying, are not possible to take the job because they don't have the needed trait.
And if you make the traits non stat dependend it gives the possiblity of story elements, in which the player seduces an unwilling girl to finally be his whore, or in which the player helps a girl to lose her fear of beasts to make her a good beast tamer, or a story about a warrior with memory loss who needs to regain her memory before she can be send on missions in the dungeon,...
It is more complex for necno i guess, so i understand if he doesn't want to do it, but in my opinion for the players it would be much easier to decide who should do what.