They're not going to "wipe" everyone just because a few players cant play with their characters.
Worst, and i mean absolute worst, scenario is that those people will end up having to recreate their characters. Not that that is going to happen, but that's the worst scenario. There's no reason anyone else should lose their characters, you know... :/
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[XI] Surivere of Valefor
[XIV] Sir Surian Bedivere of Behemoth
http://na.finalfantasyxiv.com/lodestone/character/2401553/