Redux is awful. Only the scene with Willard & Friends happening upon the French family along the river and some of the ensuing dialogues adds anything to the film. As for the remaining additions, if they aren't totally warping the originals portrayal of Willard, they're superfluous and redundant -- and coupled with some of the pacing problems they present, merely extend the run-time to a nearly intolerable length.
I don't particularly care if it was Coppolla's true vision, it's inferior to the original theatrical version. I should add that, as a huge fan of the movie, I enjoy watching the additionally filmed segments (and they're all absolutely gorgeous), but within context of the film, they largely do nothing but hurt it.