Yeah, this is a... how you say? "ass pull." Not the story not being over, but Elizabeth not being dead. She was very clearly smushed underneath the rock, and there was blood spattered underneath where her bag was crushed. But oh no, she was magically (literally tbf although I'm using the word sarcastically here) teleported out with just a little scratch somehow.
It's not terrible that the story isn't actually over, since there were SO many loose ends. But still, it would have been much better if the reader got an actual danged BREATHER. Let them go back to the demon realm, let the Sins deal with that, let some time pass, let the arc end. Then open a new chapter, with a peaceful opening, and ramp up to the reveal that Zel's not dead and the curse is still active. This just hurts. It's not good writing.