Lucien's recovery and advancement to a higher realm was a major blow for all those who dared to cross him during his short period. Back then, they all hoped that he would remain in that condition till he graduates from the academy, or at least most of it. That way they can exert vengeance on him but now Lucien had not only recovered but he had grown stronger by jumping to the second sky of the human realm and considering the rate at which he's growing these noble families are sure that when he graduates that Lucien will most likely be at a level where they can no longer harm him.
His recovery was a major blow to the Raizen clan especially and his grandfather Lucas. Since Lucien left after killing off the two most prominent clan members only inferior to him. Now he has recovered his power and has gotten even stronger, the clan had fallen into despair, blaming the clan head for their current predicament and also reducing his approval ratings.