User blog comment:CF12/Why Katie and Sadie Should Not Return/@comment-27013391-20150707070446/@comment-27329394-20150707141201

Except there is no pressing need for them to develop. There is nothing wrong with letting a character just go ignored when there are so many of them. Also I already went over the separate team thing in this blog. The issues are that a) they have shown in the past they are incapable of doing that b) their labels are literally that they are just each other's friends and it would defeat their purpose if they didn't heavily interact with each other and c) you'll just have virtually the same character on both teams.