I'd like to see japanese terms used properly, like gozoku for example.
I'd like to see the clans developed in deep around their traditions and territories and not around one or two archetypes like the shinobi-Bayushi, the berserk-Hida, the author's-waifu-utaku ecc.
I'd like to see a better representation of Merenae and Tharane in order to better include them as visitors or enemies, like it was done for Yobanjin; I don't need a school for them, just advises to play them as PC or NPC.
It is not need that everything have a school, but everything need a good description.
I'd like to see Shirabyoshi.
Seppuku wasn't the sole punishment for a samurai, there was also the loss of the family name for example.
[Oh, yeah, I'd like to see resolved the "problems" with the matriarchal clans, exspecialy the Utaku, I still don't know how the Utaku females convince the nomads to marry them (buy they the boys?) and what are the rules for males, they can't attend to other schools, I don't think the clan let them leave their family via marriage either]