Yoru
Pro Adventurer
The way the trilogy has been treating Aerith's "feelings" for Cloud, it seems it might be less interpretative going into part 3.
In REMAKE, although vague, a seed is planted on the idea of the "illusion" of love. In Aerith's Chapter 14 resolution, she says to Cloud, but mostly to herself (remake ultimania): "Whatever happens, don't fall in love with me. Even if you think you have its in your imagination." (JP rough translation)
In REBIRTH, this concept of this "illusion or "imagination" or what Aerith is having "feelings" for is explored and we get further context (though one can argue it still has interpretative elements). In the Aerith GS date, Aerith says she initially saw Zack in Cloud. After the dream date, Aerith questions what kind of "suki" (like) she has for him.
However, I think what will make it less interpretative is Zack's role as part of his arc is his relationship with Aerith. Zack is aware that Aerith has "feelings" for Cloud from Marlene. Zack also references it to Cloud when he sees him in the white space: "I'm kinda jealous of you/You've been naughty" (JP rough translation) From a storytelling POV, its an interesting choice to have Zack be given this information and kinda be bothered by it. This indicates that a conflict has been setup for him.
On the premise there is a ZA reunion (romantic), I am inclined to think that all of this has been set up to be resolved in the next game. Seeing how Aerith's "feelings" for Cloud is kinda the elephant in the room regarding the ZA relationship status, I don't think Aerith confessing her love to Zack is enough to resolve it as Zack is aware of the Cloud "feelings" and he needs to know where he stands. And I don't think its in Zack's character to pursue Aerith if she had unresolved feelings.
Even though there has not been direct confirmation of what Aerith's "feelings" for Cloud entails, the information presented in REMAKE and REBIRTH seems to be providing more clarity in regards to it. If Part 3 follows suit, I think we'll get an answer. As I don't see how her vague "feelings" for Cloud support the narrative of the ZA relationship.
Thing is... they're dead. I think your development is quite realistic in a world where the three would co-exist on the same plane. But they don't. Whatever her feelings for Cloud were, they no longer matter.
That's why her reunion with Zack doesn't necessarily need to “fix” this problem. As long as they know what happened and how they both died, it'll be enough to keep the flame alive. Because even in the unknown “he never gave her a reason not to love him”. She'll just be happy to have found him again. I don't think Zack will need anything more to stay with her. Even more so if she's the one looking for him.
Since the souls of people are made up of lifestream wouldn't a construct made by the life stream in essence be the same as the actual person? That definitely seems to be a running theme in this story.
Yes and no ? I think that's way more abstract than that. Like it is said in AC. The dead are not really there. If Cetra ghost was a real thing... I think Aerith and Zack would have appeared in front of Cloud a long time ago to let him know that all was well with them, that they were happy and that he should be too. But no. He's alone. That's because it has to come from the person. It's literally a staging of the famous “loved ones are always in our hearts.”
It's from the moment Tifa lectures him that he begins to hear Aerith. And it's when he's freed of his guilt that he sees Aerith and Zack leave happily. Once again, an extremely faithful representation of what's going on in his head.
So yes, in short I think it's more complicated than just talking to the person. Obviously Aerith has concrete actions that are reflected in reality (magic water in the church, the super phone subscription) that prove that part of her still exists within the planet. But they're not really there either. Tifa “feels” her presence. Cloud sees them at the end. But it's more spiritual than anything else.