That makes sense. Those guys seem to get in the way of a lot of his ideas and run him dry out of ideas of his own...
Maybe they think people will be bored of another generation idea and thats why others don't have kids either, like Kyoshiro and Kagetora and etc. I mean.. that's fine, they can have more characters.... but would it be that difficult to bring at least one child of Jerome's or someone else's?
Eh, who knows.