Yeah, I'm also hoping for a revamp/upgrade for the Grand Companies.
(Which Depending on where we going, can be for good or ill. or simply Expedition Support)

It's been idk how long since the last vague dev comment about Grand Companies future has been. But it has definetly been long enough to be considered an ask for the uninformed of whether they said anything of it in the past at all.

Nice to see some share their expectations.
Dynamis Job can definetly take a Shamanistic vibe if needed(from my idea example. Though I'd rather it not too, asides taking in local/personal Control of Dynamis with a Focus which if wanted too, can take shamanistic turn.)
[Mostly my ideas grew was from what anothers/a CCreators personal views were from a latest video of theirs.]

Our ideas will only change and switch over time and spread out.

One thing for sure, the poster job would have to be Heavily Lore Relevant/Fitting.
Whilst its easy for Me to imagine a Dynamis Powered(Caster or Melee) to be almost a Fit All class. If we're to be on an expedition. Too many classes fit an Expeditioners Kit.
Can Consider GNB for its large blade to cut grass.(though less likely, as it had half a spotlight in a Scions Class)
MCH/BRD, and maybe even DNC could fit.
[but, unless you've got a strong feel for the half spotlight MCH, or DNC may have had in their respective expansions. that leaves BRD, which could be used as a new Arc Opener, if you will. But sometimes we need a new onener.]
Can't imagine our current Casters to fit any bill.(BLM has been the longest Poster for the game on steam, til the recent adjustment)
Scouting armor has a hill to climb, but if it can make it, it has a fair place for the job.
Current Melee have the same issue with being Partial <-> Full Poster Jobs in previous expac.
So that leaves Healer, which with along a Dynamis Based Job, or a new job for ranged and scout. we got limited potential from my PoV of what could be the Poster job.(With struggle of course.)

While I personally don't expect anything I said to be true.(and knowing that I can dip into hype pool, and not be too disappointed if nothing i hope for comes out as wanted/well.) It'll without a doubt been a short and arduous wait for those who've waited long.(First hill, is just on the horizon)For specific changes and additions.

Who is going to bother to set time aside for the stream, amongst those who are not Ticket Holders.