The overall episode I believe jabs at the idea of rushed plot or slow pacing. Many fans have complained how slow the plot and the numerous ‘fillers’ it has and Trigger might have intentionally created this episode that centre around those ideas. We see the introduction of Lotte’s parents but were quickly put back in the backseat and the journey in getting the ingredients were very short. Akko briefly forgetting the lesson that she had just now shows the self-awareness of her character.
However, if we looked at the episode from Akko’s point of view, she did learn her lesson. She saw a brief reflection of herself on the Yeti who was pushed down by society and realized how the audience felt about her when she lacked progress and this turns her character to be more supportive like Ursula has done; be patient. The lesson continues as the reindeer grew fed up left her on her own, Akko attempts the journey back and getting reminded by those she cares about shows that by the end of the day, her bonds will ultimately helped her push through despite her faults. The plot was a long one from a certain point of view but if you removed the long and boring scenes, you can tell that it really felt rushed.
Croix’s goal in using the emotions for an uncertain goal represents something. In her first appearance, she uses emotion, red for anger. Next was yellow for happy. The third was sadness which associate with purple or in this case violet. Croix is definitely having carrying a project that associates with….rainbows. In many cultures, rainbows have very important roles. In Norse, the rainbow bridge Bifrost that connect Midgard, Earth with Asgard, home of the Gods. In other cases, the messenger or the archer’s bow in Hindu. In Australia, there is a belief of a Rainbow Serpent who is the creator of worlds. Others would have spoken that Rainbow is a sign of a great change, the time when all races come together to heal the Earth. There are many more if you look it up.