This is definitely a part of the formula at this point. The Strawhats have a big party at the end of the arc, meanwhile, a couple of characters have vague shadowy conversations that actually give you information about what's really going on in the world. It's happened like a half a dozen times now, and it's when I've come to expect all of the cool reveals to happen.
Anyway, I really love that Luffy is just planning to defeat all of the Four Emperors. He even plans to beat Shanks, just not as the first one.I wonder if someone planted the idea in his head that it's something he'd have to do to become the Pirate King.
"Padded out" is probably a better way to put it, what with the term "filler" having specific connotations when it comes to anime.