User blog comment:B214/Volume 21 info & spoilers/@comment-71.15.106.32-20160504072650/@comment-27876048-20160504124009

I personally think it is only temporary until they a way figured out that can unseal the leaders while keeping Trihexa sealed. The three sealed maous will be replaced and an extra three will be added making seven maous, Shemazzai and Barquiel will be running the Grigori, and Gabriel will be left in charge of Heaven, there is no info regarding the other leaders. I think this will open up an opportunity for other characters to develop in the storyline and Ajuka is still around so things won't get out of hand.