The long waited second statements; either they are not-good, good or sometimes real good. I don’t know why is like that but usually or at least the past 5 or more series I read the 2nd parts are not what you would expect. Probably the author wants to fill in the blanks and leave all the good parts for the next one, perhaps what happens it is what the characters wanted you to know or simply, it just did not hold your attention because there were only some good parts in it, enough to make it a short story but not a full book.
The fact that the books I am about to name are listed here, is because of one of the reasons above, not because they were completely bad as in really terrible, that is not it (not for all of them). You still read them, you still need to know what happens in order to move on to the next book.