isnt it time to unify classes/jobs? whats the point of having both of them..

[Rongway]

its a good idea...but how remove the need of crystals in game if its part of the lore?

I'm not saying to remove job crystals, but this is another non-issue. Just because it's part of the lore doesn't mean the system has to actively represent that by requiring you to literally equip one every time you switch to a job. It could just as easily be implied to be used when you change jobs.