According to you and a couple others, sure. But until y'all want to sit down and explain why you think that, the default responses and the fact that Yoshida himself responded would seemingly indicate otherwise.
They don't say much in the event, to be fair. They acknowledge the Lightning Returns event in the dialogue, but there isn't actually anything unique said to/about Legacy players. In an event supposedly dedicated to them. Everybody gets the exact same lines, the exact same way, unless you did/didn't do the aforementioned event. That has nothing to do with 1.0/2.0.
Which tells you everything you need to know about this game.
There are multiple posts in this thread showing this isn't the case and that they warned people as such. There are even more where people try to twist the words plainly stated by the development and community teams, but that's beside the point.
Case in point:
Undersized party toggle is one of the worst things that's ever happened to this game. We discussed it about 15 pages back if you're curious.
And yes, it is somehow worse than even that. Instead of undersizing content, they just threw the item at any lv30+ player that managed the truly spectacular feat of making it through 3 whole FATEs. And, as you yourself noted, it's not a remembrance of or memorial to anything because the game doesn't even bother to tell you of the item's significance or truly even who or what it's related to. It's about as noteworthy as the Cactuar or Bomb Earrings you could pick up for a couple Gil from a vendor to most people.