To answer the OP on what is cool about L5R:
L5R is brand with roughly 9 fairly distinct factions jockeying for power in a fantasy Asian Empire where player and fan activities can influence how storylines and plotlines progress.
The 9 factions are roughly (but not completely):
The Lion: Honorable Traditional Samurai
The Crane: Cultured Samurai
The Phoenix: Spellcasters and their Samurai guardians
The Dragon: Mystical Monks
The Unicorn: Compassionate Horsemen
The Mantis: Samurai Pirates supported by other secondary groups
The Crab: Pragmatic Defending Samurai
The Scorpion: Scheming Samurai with Ninjas
The Spider: Evil and Nasty Samurai
^ All that . Just all of that. Among Sparrows, WCIV, such a HUGE time among the Spider fans. We really thought we were getting somewhere with what it was going to mean to be Spider. It was really crushing when not only did nothing come of Among Sparrows, which was canonical! but all the hard work our WCIV guys put in, and just nothing. super weak sauce.
I think we have Rob Vaux to blame for that. He seems to have forced everyone to drop a planned divided Empire under Iweko II plotline (With the Shibatsu/Seiken choices at WC4 determining the pro and anti Emperor factions) in order to make way for the Kanpeki conquers the Empire with the Shadowlands Onyx plotline.