Lin Mu's disappearance without a word was certainly met with unease in the alliance. But since his actions were rather open, they could somewhat guess what was happening. Additionally, Jing Luo's return from the ancestral lands had helped the alliance know what Lin Mu was doing.
After all, many of the things that Lin Mu did were known by Jing Luo as it was among the many plans they had discussed. Because of this, the alliance could pick up from the devastation that Lin Mu left behind and work upon it.
Then the arrival of the disciples from the fallen sects also let the alliance know quite a lot. The disciples of the Ripple Mist sect were questioned in detail about all that had happened. And not only this, but it was all recorded and documented.
