Well, how could he have sacrificed himself? It's kind of unfair to suggest that since he didn't have the power to reforge the barrier to begin with. All Leo has is the Eyes of God, and they don't create things, merely see things people can't and make others see what he sees. I thought the ending was good; it may have been a "stereotypical anime ending," but I hardly think that's a bad thing. The conflict is resolved, and the pictures in the end credits show that life in Hellsalem's Lot still goes on. It even looks like that Leo got a girlfriend who looks really similar to a certain girl… Though that might just be wishful thinking on my part
Though the manga is complete, I do hope that maybe the way that things were set up at the end that perhaps there will be some sort of sequel somewhere down the road. Guess we'll just have to wait and see
Basically what happened is that the King of Despair got White to use Leonardo's eyes so that he could destroy Hellsalem's Lot. So Libra is slaughtering all those guys to stop the King of Despair and to back up Leonardo as he saves Hellsalem's Lot from being wiped out. lol also what a great show! It has humor, action, and drama. I really hope they make a season 2 as there are so many story lines left open to explore.