I had mixed feelings about Nux's ending. I was hoping he'd somehow escape the "only way to prove redemption is by heroic death" trope. Yes, it's what he wants, but from another viewpoint it's what he's been brainwashed to want. Maybe if he'd survived the movie he'd have discovered that painting or gardening or something was just as fulfilling as heroic suicide.

Still, even if he didn't completely escape the programming, he turned it around and made it serve a better cause than the one he'd been taught. And that last "witness me" was no less powerful for that ambivalency.