Maybe you thought killing was the right thing to do but it just isn't write, even if it does advance the story. Harry has lost his only friend after and losing Sirius and Cedric before that it just doesn't seem right. I'm alright with killing Bill at somepoint in the future maybe closer to the defeat of Voldemort but doing it now just takes away one aspect which makes Bungle in the Jungle unique. Now it just seems that he is going to go back to England tell Fleur how Bill died go back to school and after some more people die and the horcruxs are destroyed he will fight Voldemort, it really doesn't seem like there will be any point of him making friends/allies, or just being Harry. Having Bill around gives you a lot more options with regards to later in the story because as it stands now the Order and weasleys will blame Harry for being a arrogant kid that got Bill killed even if that isn't what happened. I personally don't want Bungle in the Jungle to turn into a story along the lines of 'To fight the coming Darkness', they don't have the same feel and killing Bill just pushes the story that way and reading the same kind of ideas in both stories will get kinda boring. Bungle in the Jungle to me is more light hearted and not as darkly-realitic, thats why I read it.
So I conclusion I don't like that you killed Bill, but besides that the chapter is interesting and well developed. Also, sorry about my above rant I just can't see the story being the same with out Bill so my ramblings may not be coherant.
Anyways keep up the good work can't wait to see what you have instore for next chapter.
Author's response
Well chapter 21 is up now and it should answer some of your questions. Glad you like my interpetation of Bill so much.~Jim