This could be a fairly big hassle for people moving from XI.
The LS I belong to for XIV has a very large population, and we'll ostensibly all have to coordinate which XIV server we're going to pick on the day the game goes live. That in itself isn't SUCH a huge hassle. The LS leader will get in game, pick a server, and post it on our website ASAP.
The problem I forsee is that the 81 people that we've definitely got (potentially over 120) all going in together have friends who want to play together too. And those friends have friends.. etc etc.
I don't think it'd be asking too much of SE to release the server list even a day or two before the game goes live.