^
Patience, my friend
At least, from what I see, they're trying to add little by little of humour and parody inside the story. If you noticed the first 2 episode, you might find that the parody and humour were only a few compared to this. Not to mention that they're pretty implicit >.>
Well, at least they're now explicitly make a Jojo's parody. . .
Let's just hope they'll add more to the future.
Or perhaps there would be a serious arc for the future, and they're preparing for that ? Oh well let's just hope ^^;