Yeah I definitely agree with you there. I wish that they had followed the same formula that XIII had with the monster hunts. Each enemy was visually unique and required a strategy in order to earn the full five-stars. It appeared far more like a fantasy game, compared to XV where the monsters are far too "realist." In XV it felt like you were just hunting animals in the wild as opposed to playing in a fantasy world. Some might like that, but I really disagree with Tabata's design philosophy of a "fantasy based on reality." There was hardly any fantasy and far too much reality.
Every Cie'th stone mission in XIII unlocked something new, whether it was a piece of equipment or an accessory. Some people even sought out specific boss encounters like Mission 55 because it gave a growth egg which doubled your CP gains. I really didn't feel like XV did anything to make me want to do monster hunts.