Just Finished, Mighty Avengers (Original Sin)

So, I definitely liked the "Original Sin" reveal for Luke Cage, and the revelation of the first "Mighty Avengers". This original team of peeps of color was good, and their tie to the story engaging. Even the mystical forming of Voltron (Avengers Prime) was okay. This was a good series, which is why I'm baffled that it ended. Why did it need to become "Captain America and the Mighty Avengers? Granted it was under Sam Wilson as Cap.