I vote extremely unlikely. In GuildWars, it is entirely possible you only play as...say.. Warrior. So giving Warrior 4-6 specializations allows it to play, essentially, as 6 different "jobs".

In FFXIV, your one character has access to each and every job. There is no point to having..say.. BLM play like..say.. BRD, because, well, you should just level BRD.