Watching my brother play kh1 when i was 4 to now almost 21 y/o me playing kh3, I had a lot of time to understand the story. From why Vanitas looks like Sora to Young Xehanort's dumb time traveling in DDD (Though I think they made that plot point better by stating that some Xehanorts are in replicas and they gave up their own bodies to be there instead of making it seem that Young X just rounded up his other selves). Like I get it but stuff in this game makes no sense to me. Here's a list:

- Power of waking. Why is it important for Sora to obtain the power of waking? Doesn't Riku have that power? I assume Mickey should know too and if he doesn't why didn't he go with Sora and Riku in DDD to learn. The more the better!

- If Sora "lost"/"forgot" his power of waking, why would they want to bring Roxas back first and not Namine so he can remember how.

- Aqua. Why did aqua let go of her keyblade in the Dark Margin

- "Light from the past". How did they do the reset after losing to Terranort. And after they do reset Goofy says something like "let's get right back at them" or something so I assume they know about the reset but when they confront terranort again Ven still walks up to him like they he didn't just fall for this.

-Lingering Will. Where the hell did he go after fighting terranort? Why wasn't he at least there with Aqua and Ven fighting him and vanitas.

-Did Terranort come from the past like the others or did he comeback after mansex and handsome were defeated? WHERE DID LINGERING WILL GO?

Edit: Thanks to one of the replies I forgot to mention this: If he is from the past that would mean Terra is
in a replica and since that terra is from the past from a previous Xehanort wouldn't he have to return to
the past at some point?

-Xion. Why wasn't she norted? How did she comeback? How did they remember her to bring her back?