I think if there was some small distinction on the Anima Weapon or in the quest based on your trade-in, I would be more willing to overlook it.

The reality is that for a lot of people, their relic has been with them for a while and they worked hard to get it. There is a sense of partnership and ownership. To forsake that and trade it in to get the exact same item that other people will get with only a slight discount on investment leaves a pretty bitter taste in your mouth.

I'd be fine if it said on the Anima weapon "crafted from the fabled Zodiac weapon, ______." An extra perk like a different color glow or something would also be nice. Something that would show a visible sense of remembrance and not some forgettable quest skip.