Sofar i'm liking what i'm seeing as far as the classes are going it seems very interesting.
In the original tactics you lvl this job to X and that one to Z and poof ninja, sam, or calculator lol
In FFXIV you rank up one class to x and another to z maybe mess around with a few extras and you gladiator is now a PLD or MRD is a DRK.
I'm not sure what there plans are as far as advanced jobs in the future but they've given us alot of options for a start.
Just looking through what i've seen i've got plans for a semi bardish class, considering pretty much all the buffs are aoe it's not that difficult. but still more playing around and testing to be done.