I still wonder why it basically isn't that way. Nowadays a MMO try to do the most account wide as possible especially to encourage people playing more. Gw2 is the best example for this. Even WoW, which launched in 2004, became more and more account wide, for achievement, minions, mount and even glamour. And here on FFXIV, launched on 2013, we're still stuck with everything linked to the character which doesn't motivate anyone to make another character. The only motivation would probably be a friend.