It would definitely be a shame if this was the last arc. It's one of the few romcom mangas out there that I genuinely can't wait to read. It has just the right amount of romance and hilarious comedic timic. But, I can definitely see why this would be a good place to end the story.
As for the chapter, it was really nice seeing the White Cats defend the Black Dogs. Somewhere along the lines, some of them must have formed some kind of friendship/bond and that's what made the White Cats defend them like that. Also, Char and Leon together? Yes.
it wasn't just with the white cats standing up for their black dog schoolmates. even beforehand what romeo thought was a sign of a fight was the dogs inviting the cats to towa next time (and accepting), and in the cathedral itself, black and white are clearly mingling together. such small moments really show the changes Romio and Juliet made to the student body.