User blog comment:B214/Volume 22 spoilers/@comment-27083298-20161115021134/@comment-1359322-20161116083259

Don't forget the Heaven is in wreck again after the 666 attack, even worst than Grigori and the Underworld in fact.

"The damage which occurred in Heaven was even more serious. Three of the Seraphs had been seriously injured; Raphael had lost a leg while Uriel had lost an eye and an arm. Several of the Angels who had existed since ancient times had died. The final and uppermost Seventh Heaven was successfully defended, and the [System] which was left behind by the God of the Bible had been protected. …However, the sacrifices which were made for that were simply too great."

There's a severe doubt if powerful Angels are still around, and even if they're still around, they might be busy with repairing the Heaven.