I did the LTW questline first. Got to the final quest, realized I needed the masterbook. Jumped to the conclusion that "if it is gated behind a masterbook and requires a 1-star recipe, it is going to be something good." And I think I got a choice of a Tier IV materia... or a set of Tier IV materia. Not sure. Never did another crafter quest past that. I'm sure at some point they'll make something that requires you to do them, but they couldn't throw us a bone with this? Hell, how about making the reward 300 blue scrips? That'd be worth something to some players.