I had been spoiled back then so already knew she was about to die, but I found Cloud's (and the party's) reaction far more impactful.
They just can't not do it again. We must get to see the reactions to that with REMAKE's newfound character brilliant performance.
They will, I am so sure that we will eventually get a quote from the designers along the lines of: "When discussing the plans for the new story of the game there was one thing we all unilaterally knew for certain from the start, Aerith was absolutely, positively, not gonna make it outta this alive."
I am so certain a quote like that will emerge at some point that I feel like I can already remember it happening in the future.
Hell, it's not even that I think Aerith will die that I think that quote will emerge, it's just that I am so certain a quote like that will emerge that I am so certain she's doomed.