Beyond the humour of this episode, which some hardliners will readily latch on to as ammo against this episode (Do some people hate laughing?), this was also a character exposé episode as well. The theme behind the ep seemed to be how each of the three main characters are coming out of the shells they built around themselves due to the relationships they have formed. Alto has to drop the mask he wears at school of the "Ice Princess" when he's embarassed by having everyone thinking he's dating Sheryl, and then again when he rushes off to save Sheryl with his EX Gear. With Sheryl, we get a continuation of her softening character since the incident in ep 1 ("No fans!"). We're also shown that Sheryl dislikes being bad at anything, to the point of joining Mihoshi Academy's pilot program to master the EX Gear (with the ulterior motive to be close to Alto, I'm sure). Ranka is shown to be getting stronger, unwilling to take Sheryl's help to reach her dream, instead taking the hard path. Also enrolling in Mihoshi to be with Alto shows her new found boldness, even though it's shortly crushed by the arrival of Sheryl.
As much as the episode was silly antics, the character developments in this episode would make it hard for someone to skip it and not feel a bit lost.