Hindsight is 20/20, but it really looks like the lander descended too quickly, at least at the final stage. I mean, any smaller bounce would have prevented the shadow landing. But then, there are probably risks associated with a last-second deceleration, and the odds of both the top-thruster and the clamps failing were probably small.
The only way to make it hit at a lower speed would be to have some sort of thruster on the bottom, which could have failed just as the one on the top did. Additional redundancy may have helped, but that would have reduced useful payload for other things, and since the top thruster is more versatile then you may as well go for redundant top thrusters rather than top and bottom.
