so maybe it got better than what I saw.

Not really, the mineshaft episode is pretty much where you can decide if you like it or not. The narrative keeps progressing at a good pace without losing focus, the stakes are hinted to keep the viewers interested and there is no filler content. It is not outstanding but it has no flaws either. I liked that the characters are not op (in comparison to their enemies) and have some depth. And there is no fan service which is refreshing.