For Qin Changqing, the current outcome is even more satisfactory.
Qin Changqing doesn't have a habit of killing women, even if they are as wicked as this. It's indeed better this way.
Of course, if things get serious, Qin Changqing won't show any mercy.
They are already mortal enemies, so there is no reason to be extra considerate.
Asking the Sect Leader to do the killing would only sully his hands.
If this woman were not the Ancestor Dongfang's, for instance like a complete witch, Qin Changqing would have a better punishment in mind.
Before she died, this woman despised Ancestor Dongfang the most, shifting her hatred onto him.
Otherwise, being an Evil Cultivator herself, she might have dragged others down with her before her death.
It seems that Ancestor Dongfang also suffered greatly.
As for Dongfang Yue, although he left, Qin Changqing could eliminate this potential threat through the Great Dream Recording Skill.
Killing in public would not be prudent.