Anticlimax ending (spoilers)
I felt that this film lacked one or two shots to really hammer home the joy of escape. The last we see on Papillon in close-up is on the cliff. After he jumps, and as he floats, we are distanced from his personal victory, which dilutes the feeling of that victory, after all, we have followed him through thick and thin.
Washing up on shore or even his eyes as he sights land would have really helped.