I approve of how you plan to dot he route specifics. Just make sure there are bits (even if small/few lines) that are there regardless of route (in which case could make it generic version for if not on a given character's route, but in a sort of character specific scene, such as in class with one of them, else dialogue is spiced upa little to represent the fact hat you choose them???) You may already be planning on this though :3, they all deserve love! ^^