I watched maybe the first 3 episodes of Rebels but just didn't have time to finish it. So I had only the barest bones familiarity with some of these characters. And it was really, really though to try to get emotionally invested when I felt like I was coming in to the halfway mark of the story.
The problem with Disney pumping out endless content is that you don't always understand the stuff you really want to watch because you're missing important context. And most people simply don't have time to invest in double or triple digit hours of content as a prerequisite for other content.