They have obviously changed the characters and plot quite a bit for the television program.
I am satisfied to see justice meted out, in whatever manner is appropriate.
How do you decide what is appropriate?
Paul Krendler meets his just reward.
IIIIIIIIIIIIIIIIIIIII love it!
The TV show is more of a prequel where we see him before he was imprisoned and people found out he was a serial killer cannibal.
That’s what a sentencing hearing, or its equivalent, is for.
I don’t believe that Will Graham knew him before his capture described in the novel, and they have killed one fellow already that dies much later in the novels.
Well, he DOES triumph in the end, but only in that he turns away from the Dark Side and by killing the Emperor he destroys the Sith and saves his son’s life, at the expense of his own.* Does that count? 
(The Empire won in the prequels, but that was because they were about the events that happened BEFORE the original movies.)
I think people find villains (as well as real-life criminals) fascinating because they wonder WHY people would do such evil things. (For example, I own a book on the history of cannibalism.) History is bloody and ugly and disgusting. You can’t ignore that. And we humans tend to have a morbid curiosity about that kind of thing.
I LOVE horror movies. I love being scared. I know it isn’t real, so it’s a “safe scared”, if that makes sense.
*And no, I’m not spoiler boxing something as well-known as THAT.
W-ell, I suppose that would count, but only with a Darth Vader type.
Did you ever see * The 7th Voyage of Sinbad? * To me that was the scariest movie ever-- particularly near the end, when the villain told a live skeleton in a chilling voice, “Kill him!” and it engaged Sinbad in a fencing match. I was ten years old at the time and I had nightmares about it.