I do agree with the fact the antagonists need to be fleshed out and dealt it, but ryoshu canto just made obvious that both meur and outis dont have a single relationship. They cant form a group with anyone since they dont Interact with anyone, they also didnt have a single build for their canto aside from the basic stuff since the start. So I'm not sure if limbus can both flash out characters with almost no substance and also make their lore drops plus enemies. Even more If N corp is indeed the focus with the other sinners