For me, I desire some kind of damage mitigation classes.
We have one support that’s falcon.
Every other class is just straight up different deliveries of damage, but nothing else.
While mages/cleric/warriors have all sorts of damage mitigation and team wide utility along with dps abilities.
yet archers is just straight up damage 100% and not even the highest.
So for rank9 stuff, would like some kind of arrow shield or stuff like that.
Quarrel shooter…
yea, like that piece of wood matters
well i think 2 final rank of every class will base on untimate skill like. strong but pretty long cd. or base on support old rank for don’t let R8 class down. if they add new class with strong skill and low cd again. it will destroy almost all lower rank.
maybe something like an Engineer? able to build siege stuff like ballistas, trebuchets and things like that, which anyone in party could operate.
Not sure it quite fit the theme though
That piece of wood aka Pavise might save undergeared people from incoming Spiral Arrows. 
Quarrel Shooter also has an attribute to block most arrow attacks when equipping a shield. (I think this is what bloodyaugust implied to your Arrow Shield idea)
As for me, I want a more CC-based class without pet and its stupid A.I, Appraiser class, and Mechanic class that can create a mountable war machine + use its aoe clearing skills.
I want the r9 skills to not crash the game, that will be a good start.
Peid Piper - CC Support
Appraiser - Support
These are 2 Archer classes, they are pretty much confirmed as support classes
Puppeteer - Possibly hidden coming in the next few months, it seems like a DPS or Support class
I would like the game to get better in its current state.
Then the devs can start to start to think about rank 9.
Overall improvement for Mergen and Hacka ala Goon2.
More mounted compatibility with low rank skills (I’m looking at you, Rogue!)
Improved pet skill targetting.
Merchant class for Archers since all other 3 base classes already have at least one.
I like the engineer class idea too - perhaps one that synergizes well with Sapper.
FPS and less-to-none of the random/bug crashes!
I want some SMGs and grenades pls. We already got pistols, muskets, and cannons. Some turrets would be nice.
If not, due to it not being time period correct, then some kind of magical bow class 