She did think about, in her name, having Wan Yu join a Righteous Sect in the Qianyuan Plane, carrying the Hundred-Legged Jade with her.
But those who possess the Hundred-Legged Jade must inevitably hold a pivotal position within the Sect, and if it's not the Sect Master, then who else could it be? Yet, to have a Sect relinquish the position of Sect Master...
Just thinking about it seemed impossible, and she didn't have the nerve to do such a shameless thing anyway.
Therefore, she could only think of having Wan Yu take over the Thousands of Demons Sect, of course, those who were truly evil beyond redemption within the Sect, she would have to help eliminate, leaving behind some promising youngsters would suffice.
As for suppressing the other Sects on the Qianyuan Plane, preventing them from making a move against the Thousands of Demons Sect, naturally, she would join forces with Qian Jiyun to take care of this matter.