I don't think they're ever going to allow that. But if they did, I'd take up the offer, even if I had to pay for it.

I abandoned my 1.0 character when ARR came out because I wanted a fresh start with the game and I had admittedly got level 50 on most of my classes through stronghold powerleveling. Though my ARR character has the legacy chocobo, she doesn't have the tattoo, or legacy titles, or the special goobbue, or the piles of dated gear that can be worn on any class. I have no desire to start the game all over on my 1.0 character either, since my new main has holiday items going back to the beginning and I've spent more than I want to know on fantasia and mogstation items.