Half of the people in the Ji family were sad, while the other was happy for Ji Fengyan's death. When Ji Fengyan received the World-Termination-Armour initially, there were few who were pleased. Moreover, after she had oppressed the entire Ji family, there were many of them who had to beat with it, especially Ji Qingshang who was chased out of Ji family. After knowing the news of Ji Fengyan's death, she was the first to return and blatantly moved back into where Ji Fengyan had stayed in previously.
Other than Ji Linglong, Ji Fengyan's death upset none of the people in Ji residence. What really bothered them was the missing World-Termination-Armour.
After the attack by the demon clan's army, they could not find even the corpse, much less the World-Termination-Armour.