rocci we have been over this, several time in fact. 'Yes, whatever Boruto is selling is fine for any average manga But the expectations for it are so high because it is the sequel to one of Shueisha biggest international sellers. That anything other then incredibly high sales means it failing in the eyes of the executives.'
It should be lucky that it is adversities on WSJ, the biggest magazine in Japan (at least in manga department wise). Otherwise, some wouldn't even know. But I can't say Volume 2 decrease doesn't mean anything because look at Super. Not only it has anime to be technically first, but the second sold more than first. So the excuse isn't valid for Boruto.
But don't worry. It will continue on...unless the sales goes really bad next time.
The main reason it has survive despite everything else says that someone high up in the staff or the executives was backing the editors attempts of controlling the manga. Now that it failing since basically the implementation of what they were supporting. They have taken its success very personally (obviously not kishi since he seems to be emotionally done with the manga now), and refuses to let it die out of pride.
Also remember it chapter 8 I know we have been using topic for chapter 6 to talk but it's chapter 8 coming up.