C2495 First Order Difference
Although Yelan Xin had lost his power, the title of Second Elder was still there. There were still a lot of important proposals in the family that needed to be voted on by the managers.
If Yelan Qiu came back, then the original two to one ratio would become two to two, which was enough to restrict his authority as the Patriarch.
Moreover, Yelan Qiu was the strongest in the clan