My opinion on Maul's demise in a quick Kurosawa-ish battle is probably going to be an unpopular one but I found Maul's demise to be ironically poetic because, let's be honest, even though Darth Maul probably had the most compelling (and my personal favorite) character arc in both the Clone Wars and Rebels series, His role in the story was now irrelevant to what will happen in the events of the original trilogy. By this point in time, He was just a crazy & weak old man that was way past his prime and has no army at his side, trying to settle an old grudge that didn't matter anymore while the rest of the universe was at war. That and the obvious time constraints would obviously result in him dying in such a way.
What about you, fellow viners? What are your thoughts on Maul's death in Star Wars: Rebels?