I honestly have doubts we can tell what the job will be for certain except for our own desperate wants.<unless someone actually didn't put any chips into any boats here>
Me I always was for a Ranger/Scout(ing armor) Jack of all Trades job to go with Ninja.
[But was never for corsair. Mostly for the fact we never had them ever since we could of in HW. Historically] Traps, DoTs, what have you that would fit an adaptable class. (even if it took nods from characters from heavy media who also took such positions. or where Survivalists) or masters at many arms.
It'll be funny if the shirt that YP Showed off this weekend and the next FFest had nothing to do with the Melee.
Though, he has done Authors, Imagery, Direct-adjacent References.
I never paid attention if he has made indirect via feel or color reference.
at least we have an idea of melee(Likely to be scout armor) and one Caster DPS(which unless you'll count any shirt, also opens up something some have asked for in a different form of creation.)
edit:
Add Some Jalapeño for extra acid/spice and I'll take it.