Love conquers death? What does that even mean? Is death (the breakdown of order and expenditure of finite energy stores in the Universe, on the microcosmic level of the breakdown of the human body to the point of total non-operability) a cosmic force that was introduced as a result of man's fall? Is that the big problem? And not the sinful nature of man (which in my opinion was simply exemplified by, rather than caused by, the Fall)? But if sin was the cause of death, then wouldn't the continued existence of sin mean a continuation of death as a natural consequence of such?
A better way of putting it would be "love conquered sin" imo.