It wasn't necessary to have that much dialogue. It was repetitious. They were beating a dead horse while teh pope was chargin his lazor.
It was even less necessary to have the dialogue in the middle of a fight. Sometimes it is for artistic purposes, sure, but this wasn't such a time. The storyboard could have had the heroes hashing out their problems in a separate instance than fighting the pope, or hell, even if the storyboard was the same up to the fight, they could have put it off until later and it would have been much more believable.
Well, I guess next episode might show some reason that wouldn't have worked. But even if it was somehow necessary for the story to work, it was more tacky than most anime, and this anime tries to brand itself as a little more serious than that, so it just came off terribly. This part of the story was just not skillfully put together.