I’d go as far to say they’ve very much turned Claudia’s death into an actual mystery. They really didn’t have to include Sephiroth describing stabbing her, the weird out of sequence part of Cloud’s house burning, and her final words being heard from Sephiroth mocking him in Remake, and then in her own voice during the flashback.Apologies for being late on the response here. I just don't feel like avoiding scenes between two major characters that do in canon mean a lot to each other should be avoided just because they could be interpreted as romantic. If they stick to their guns and make clear CT and ZA are endgame I really wouldn't mind if there's a Clerith scene or two, Aerith is important to Cloud after all, and shippers are gonna ship regardless so why nerf the story for their sakes?
I think Aerith's death being given more focus than Claudia's is as simple as the devs knowing the player is gonna have more of an attachment to a main character than an NPC that dies in a flashback. I'd also argue the people you know for very briefly can still leave a massive impact on your life, but I do think this was done mainly for Doylist reasons.
That being said:
I agree. They've already expanded on Claudia and I'm sure they'll take some time to let Cloud (and Tifa) sit with her death for a bit in part 3
Either Claudia is just the very first case of Cloud suppressing a traumatic memory, or ( which is my likely untrue suspicion) Aerith’s death has some eerie parallels to it, and that’s the real reason why it’s a double whammy.