The series is at its best when it is serious and the characters are engaging in high tension mahjong duels. The most detracting aspect is by far the fan service as the characters, paneling, writing, to name a few aspects make this a thoroughly enjoyable read despite that.
Like the rest, this fight felt obligatory rather than essential, a way to show off some fan-favorites and play with some crazy ideas before the series ends. Which is fine and dandy, but it’d be nice if there was something more substantial to go along with it.
Episodic chapters and short arcs like this are a nice way to bring a few neglected characters back into the ongoing story, and one hopes that Yoshikawa has been doing this as of late to help build them up for bigger roles to play in the next long arc.