Serialized adventure is as old as storytelling itself, and it's popular because it works, you don't need to reinvent the wheel for every story. Yakuza princess is charismatic enough to carry the plot on her own so far, and if the writing holds up, we'll be getting good arcsa out of the elf girl and the knight as well as any other side characters.
I also disagree that it's getting repetitive, they've clearly progressed since the beginning and will definitely reveal more of the overarching plot to wrap up the Merchant King Arc.