Jobs and Class, I am nervous now.

[MartaDemireux]

You might be right on water, as I recalled it from memory of BLMs; Vivi in IX, Lulu in X and BLMs in XI, VII and VIII didnt realy have set job/class roles of BLM etc.
The "elemental wheel" is rahter crooked in XIV, but in most of the later FF games a BLM could counter most of the basic elements themselves(like water > fire > ice > lightning > water etc).

I realy hope JSE won't be the major difference, I'd much rather see it being stats or traits.
Getting stuck with the limited options of using mainly(or only) JSE equipment for jobs to gain an overall edge over classes would be very disapointing and remove a big part of character customization in terms of gear choices.

While jobs having a handful of exclusive abilites is a upgrade I can't see that impacting a huge advantage over classes alone, but perhaps patch will prove me wrong in that since we don't know exactly how powerful our new abilites and spells will be.

Well 10/10-2 had kind of a cracked wheel too, water <-> lightning, fire <-> blizzard and that was it.

What you bring up here is exactly what I foresee though. Classes are about individuality, jobs are about pigeonholing. Although you can pigeonhole classes too, you have some freedom in colors and whatnot. Jobs are supposed to be iconic to their predecessors which would greatly limit individuality as well. Price to pay I suppose, pending on the situation.