Not a huge amount really happened in episode 22, only that the entrants rallied together to express their discontent at Koogy's devious scheme to win the competition, resulting in a level headed Moritaka calming everyone down with a speech inspired by the head editor (when compared with how he acted at the beginning, he has definitely grown, in this regard). Ultimately, they all decided to head over to Nizuma's place (this has become a social ground, of sorts), which I don't particularly mind as I've grown fond of his eccentricities. Was pretty interesting to hear their inner thoughts of each other's manga, but admittedly I was hoping for something a bit more substantial. Lastly, Miho hasn't been completely forgotten, featuring at the end, concluding with an obligatory text message to instil renewed confidence for Moritaka.
Now that the series is coming to an end, I do wonder how they'll maintain the momentum leading up to the finale, which will presumably be when the winner is announced, or if not, the penultimate episode.