I really don't get it...
It's so common this days. You have a good story, nice pacing and great art... then the manga becomes popular, and *poof* the author runs out of ideas and starts a 15-30 chapters arc as boring as possible with absolutely no consequences on the main story.
Then he conveniently cleans everything with a magic Deus Ex Machina out of nowhere, introducing new elements in the story that are going to solve everything in 1 or 2 chapters.
Fuck this, I'm out.