Have you ever played a new MMO that let you transfer/keep your character name from an older title? Why should previous FFXI players get an advantage to be able to keep their names over people who didn't play or have cancelled? It's unfair. They seem to bent out of shape about getting people to go from FFXI to FFXIV. I wonder why.
No, of course not, but that does not mean that FFXI characters have an advantage at all. If surnames were added to character names I'm sure new comers will be allowed them as well. Now, supposing that there is some FFXI player that has the exact same combination of names, with the exact same spelling, they still have to join FFXIV before you do. That is no different than having a player already take your single name to begin with. So, I ask you, where is the advantage?
I think the surnames are a good idea. Yes, there will be (mark my words) quite a bit of Cloud and Sephiroth use, but those people would have just spelled those names differently or added a random word/string of numbers to that name anyways. So they they named their character after a character that they like. More power to them. Who am I (or you for that matter) to take their freedom away because repetition irks me?