User blog comment:TheNewProtagonist/Vol. 2 Episode 1 - I just.... why?/@comment-14640999-20140727011827

The food fight had a plot point to show that they had all managed to get better at fighting (specially Jaune... though his case is a bit of a special one), so while the good guys dont get a kickstarted plot, the bad guys do.

This shows that by the time the good guys are clued into the plot, it'll be really late and they'll be at a huge disadvantage.

It also shows that the Hunters-in-Training are capable of fighting with a variety of weapons and still pose a semi-credible threat to whatever they want to beat up (specially Nora's MelonHammer >.>) and the fight was at least entertaining.

There's the plot point of both teams truly letting Neptune down based on what Sun was telling him and could bring about a huge string of distrust between team members and even effect the teams' relations to each other since Neptune (who appears to be listened to a lot more than Sun is on their team) got a really bad first impression with the food-fight.