User blog comment:B214/Chapter 433 & 434 in a nutshell/@comment-3441749-20150512191445

I'm under the impression that Mashima is not putting his all into this arc, and probably isn't enjoying doing it. The fact that he's just rushing through it with two chapters a week, shows that either he's doing this under obligation (which he has been known to do before with Lisanna) and just wants it over with, or he clearly doesn't care about his fans (which I'm not inclined to believe at all).