People are acting like everything the devs say is set in stone and will never change. You're forgetting that it's their house, and their rules. It's their game, their property.
Companies promise things ALL THE TIME. They either fail to deliver, deliver less than expected, or they actually keep their promise. Sometimes they deliver MORE than expected. They have the right to change things because they own this game. They could decide tomorrow to invalidate everything and make Ultimate Coil weapons available to the masses.
It is their decision and theirs alone.
Now with that kind of power in decision-making, they also have to face the consequences. Consistently fail to deliver and customers will leave. Consistently over-deliver and more will come (but at the cost of time/resources). It's very much a delicate balancing act. The 1.x players that got the original earrings AND are still here today on that same character are probably a fraction of a fraction of a percentage. The devs have likely decided that it might ruffle their feathers a bit to see this item return, but they are such a small minority that upsetting this tiny apple cart is not that big of a deal.
It's kind of like the outrage that people had back when Diadem 2.0 came out and they could (rarely) get weapons better than savage at the time. But again, the chances that this would happen were astronomical, and people still lost their minds because of the POTENTIAL that heaven forbid, someone get an equivalent weapon that's better than the one they worked for. Nevermind that it's again a fraction of a fraction of a percentage. They blew it way out of proportion.
Of course, we don't know what exactly the Rising event holds yet. It may be the exact same kind of fight, synced and otherwise similar to the original in every feasible way. As the original no longer exists, this is likely the closest they could come to replicating it
This year's Rising event, and thereby the earrings, I think were meant to help bridge the gap between the legacy and current players. They may have even promised at the time that these items would never be available again -- but do you think they even saw a future for this game five years from then? It bounced back with RESOUNDING success. THAT probably was NOT expected. I would hope that the earrings aren't just given out for free and are earned in a similar fashion, but again, their decision.
I just think a lot of people are losing their minds over something that hasn't even happened yet. If those earrings were just tossed out like candy at a parade then yes, I could see why that would be upsetting. But again, that's a fight from five years ago. With that kind of logic, I should vehemently protest machinist being in this game because I beat Contra without the Konami code 30 years ago :P