Can new players join me?

[Medura]

Dungeons and FATEs are also going to have level sync and seem to be a bulk of the partying experience so you can still play with your low level friends and help them get XP no matter what level you are.

Level sync, maybe so, but well, not in a few major patches, and when those major patches has come, the game wont be new anymore, will it? :P (yes, level sync is one of the things that will not be at launch)