Jia Xu and Guo Jia's words could be considered a different form of approval for Chen Xi's approach, and Liu Bei was able to understand Chen Xi's actions, but he was not here to discuss this matter; instead, he planned to proceed to the next step.
Xuu Zijiang's official announcement also served as a warning to all the Feudal Lords of the current world that it's time to suppress the Outer Barbarians.
In Shouchun, Sun Ce and Zhou Yu left their respective places of comfort and journeyed together to Eastern Wu. There were matters that needed resolving— the Eastern Wu War should end; continuing any longer would mark them both as incompetent.
In Chang'an, Cao Cao gently burned the official announcement. Just as Liu Bei and Sun Ce had come to realizations, Cao Cao also understood what issues needed to be addressed openly now; other matters needed to be postponed.