This has kind of been one of my main hangups with the game is the homogenization of the jobs and gear. It does kind of make you feel "just like everyone else". But on the other hand, balancing a system like that is a nightmare and that's why you see other games like WoW and GW2 completely butcher their talent trees by giving fewer choices and making them more rigid. Even then, when it seems like they're giving you a choice in your spec they're really just giving you the illusion of choice if you want to play the class optimally. Then it just becomes a chore for the player because they have to research the best builds for their class. I mean don't get me wrong, I know there are a lot of people that actually enjoy that and I'm one of them, but this is a game designed to cater to a large casual player base who probably don't want to deal with all of that.

Because of this I don't think they'll ever add them to this game. They've already completely removed custom stat speccing and gutted the cross class skills to simplify them even more. I think the closest we'll ever come to having customizable jobs is their iteration of BLU and whatever other limited jobs they decide to add.