What Jobs would you like to see in the next Expansion

[Reynhart]

I think RDM will be one of the harder ones since this game doesn't really get big into using debuffs during bosses.

Or maybe we can remember that RDM was a debuffing job only in FFXI.

Usually, RDM is totally different. It's a hybrid Healer/Caster/Melee job.
On that, it could be easy to just give it some melee WS and stances to increase either magic attack potency or healing potency.
It also didin't initially have Enspells...

The game would consider it a DPS job, with some healing prowess. And it would be interesting when you're not comfortable enough to do solo heal strat, but when bringing two healers is a little overdue.