I have mixed feelings about this. On one hand I completely agree that all efforts should be taken in order that no harm is cause through intended or unintended use.
That being said, and I don't mean to minimize the tragedy here, but it was 50 deaths compared with 5,000,000 units sold. Then consider how many individual use cases, maybe the average Rock N' Play is used nightly for 6 months.
So you're talking, conservatively, upwards of a billion or more times a baby slept in a Rock N Play and 50 of those times resulted in a death.
That's a practically immeasurable 0.000005% of cases.
Does that mean the product is unsafe? That's really subjective, but keep in mind, no product is 100% safe. People have been ki---d by a plastic straw. And the truth is, improper use exacerbates the risk, so if a manufacturer provides a safety harness and slaps a bunch of big warning labels on it and make it very clear that the product is unsafe to use without that safety harness, and you, as the caregiver of the child choose to ignore all that, well then I feel like at least some of the responsibility must be put on the adult.
It's all a very sad subject, but personally I feel like FP did not produce an especially deadly product here.