A bit underwhelming in my opinion, there was a lot that we didn’t get an anwser to, and thats fine if we get a seguel, but if not this will become a more rushed ending than it already felt like.
I'm pretty sure the mangaka ended the story to concentrate on Helck 2 more soooo... I'm not complaining. And I doubt the mangaka is the type of person who wouldn't continue the story, I'm waiting for the sequel (even though it will take years to see, I feel).