Well they already gave away White Ravens so it's tough to argue that anything really needs to be preserved at this point aside from legacy tattoo/mount stuff. I've got Asuran Armguards and I don't care if they give those away again (as long as I can get Garlond Goggles).
There's stuff like "
dated gear" from 1.0 that's just regular gear, but in 1.0 gear didn't have class restrictions and that was carried over in those items, so if you had it in 1.0 and didn't throw it away then you can glamour some ugly old heavy armor on your mage jobs! There's no good argument against them just adding all dated items to the calamity salvager for anyone to buy, it would actually free up some of my inventory space if I could toss them and not have to worry about never being able to get them again.