In seriousness, I don't think Zelda has these huge glaring flaws that require a total redesign of her character, it's just a bunch of tiny little quality of life tweaks that would make her much more enjoyable and usable without changing how she plays much.
Stuff like:
Phantom Slash
- Allow Zelda to store the charge
- Increase hitbox size to fix blindspot issues (base Phantom hitboxes upgrade to Strike's hitboxes, Strike upgrades accordingly)
Din's Fire
- Change the explosion to transcendent priority, so it doesn't get beaten out by any random hitbox the opponent throws out
- Less startup and endlag, explosion occurs more quickly
- Zelda isn't put into helpless when used midair
All multihits
- Use autolink angles to prevent opponents from falling out
Uair
- Increased KO power and/or less startup
Nair
- Reduce landing lag by ~8-10 frames, its landing lag is absurd for the type of move it is
Fair, Bair
- Stronger sourspot hit; maybe something like 6% and enough knockback/hitstun to make it safe on hit.