I agree that the original cut works way better as a film than the redux. While I like the added scenes when considered on their own, they completely derail the oppressive feeling of slow descent into darkness that the river journey otherwise creates.
Personally, I consider Apocalypse Now to be a horror movie, in the true sense of that word. Every time I watch it, I feel like I understand Kurtz a little better and have slightly better sense of where he's coming from - even though we're nothing alike, I can see how someone could get to there from here. And there ain't nothing more horrifying than that.