Okay, this is good. I think we've identified the major issues with these. I have a version of these I did before the current version, but I didn't use it because I'm uncertain about introducing unique effects. Here's the alternate version of Harvest (Autumn Blade) - see if this would be a more viable approach:
Harvest [-2]
Description: With a textured grip and a slender, curving blade, this weapon resembles nothing so much as a giant predator's talon.
Musts: You must have an aspect related to your possession of this item.
Skills Affected: Weapons
Effects:
[-0] Purpose. Borne by the Autumn Knight before that Courts fall, this blade is rumored to possess a small part of his essence. It seeks to carry out the last command given by the King of Autumn.
[-0] It Is What It Is. It's a sword (Weapon 3). The pointy end goes in to the other person.
[-0] Unbreakable. As an Item of Power, this item cannot be broken except with a magical ritual predicated upon perverting its purpose.
[+2] One-Time Discount. It's a sword. It gets noticed.
[-1] Vengeance. When used against a member of the Winter Court, this blade treats any Toughness powers as being one level lower.
[-3] Autumns Bounty. Just as autumn is a time of harvest, so does this blade grant the power of it's grim harvest to it's bearer. When an opponent is slain with Harvest, the bearer can spend one fate point to pull the power of the victim's feeling spirit to him, granting him Inhuman Strength, Speed, or Recovery (the Catch is Cold Iron) until the next sunrise.