Even though Shunsui basically educated Lille on the functionality of his zanpakutou, I don’t really mind. The situation and Shunsui’s zanpakutou warranted Lille needing to know the “rules of the game” in order for Shunsui’s zanpakutou to fully function. And keeping Lille in the dark about the abilities of his zanpakutou wouldn’t have helped as Lille had expressly mentioned that the Sternritter had done comprehensive research on the Shinigami’s zanpakutou’s and their abilities shown throughout the battles they have had so far (information gathered from the Spirit King’s palace?). With both parties restricted by the “rules”, the victor will be decided on how one plays the specific game.