It was a pretty funny chapter, but it felt more like an omake rather than an official / canon one.
I think Mashima doesn't really know what to do with this arc anymore, because it has been all over the place, especially in the fights department. Except Natsu's fight with Zeref, which felt at times a little bit like it was made by Micheal Bay, every single fight was disappointing. Wahl had such great potential as a huge powerhouse enemy, but he was made a fool of, same with Dimaria who even though had a clichee personality, at least had interesting abilities.