I'm glad everything is resolving, although I feel that much of the plot was still a bit confusing. Like the motivations of the celestials...okay they felt the world was bad in some way and should be destroyed, but we don't have much detail about what they think would have happened if they didn't destroy it. Or how they could act so obviously against God (since this seems like a very Christian worldview).
There were these big threats that were defeated, but because they were only formidable threats in a previous timeline, they tended to be more tell and less show.
The original premise of the MC being genre-savvy didn't last long, as it was replaced by the dramatic plot about the fate of the world, and honestly I preferred the more comedic rom-com style over saving the world.
Overall this has been an enjoyable story, but I just wasn't as engaged with it starting from around the point where they went to the northern Duchy and it suddenly became more of a thriller.