The reason Hannibal starts out as such a violent and gruesome show and ends very elegant and aesthetically appealing is because it’s Will’s story. At the beginning he says that murder is the ugliest thing; it is shown that way visually while he thinks it. But as his opinion and beliefs start to change after Hannibal’s influence, he begins to see death and murder like Hannibal does: a story, an offering, a thing to be admired. It can mean sorrow, heartbreak, love. It’s an artwork. And that’s why the show progresses, visually, like that.