User blog comment:Omega natsu2/Episode 176: The Dragon King, Review./@comment-183.171.161.141-20140405175904/@comment-5840892-20140405185037

I'm afraid I might Jinx it but:

Like someone said below, they might only use crappy/unfinished animation for the previews/pvs for budget reasons, and then hit us with the good stuff in the next episode. This might also be to show the difference between how it USED to look by the old studio (mockingly ofc) and how they plan on making it look in the future, as well making us appriciate each real new episode as it will have better animation, and the previews are used to keep the wonder at the new quality and style fresher longer. I was thinking this since last night anyway. It seemed legit to me.