Time to finally show all the good news about RO2 Jobs and their systems.
*Please Note: all information may still vary upon it's official release, due to it being still under development. Thank You!
You'll start off with 5 Main Jobs-
Swordsman - Acolyte - Archer - Magician & Thief
Lvl. 1~15/20
Upon those you'll currently branch off from 2 jobs like in RO1.
Swordsmans = Knight or Warrior
Lvl. 15/20~50 ~99

Acolyte = Priests or Monk
Lvl. 15/20~50 ~99

Archer = Ranger or Hunter
Lvl. 15/20~50 ~99

Magician = Wizard or Sorcerer
Lvl. 15/20~50 ~99

Thief = Rouge or Assassin
Lvl. 15/20~50 ~99

Now it doesn't end there - Instead of Rebirth or 3rd Jobs, RO2 will currently offer a Light and Chaos system currently known as the "Chara System" [Name will mostly change]
At Lvl. 50~99 Players will be able to choose between staying Neutral - Light[Holy] or Chaos[Dark].
Upon playing as any of those Hues you'll be able to bounce back and forth of which side you wish to play as. However, re-gather points to change back and forth to a certain side will take awhile. Though this allows players to fully take advantage of some skills being offered while being Light or Chaos. Being Neutral will have it's advantages as well.
Will this effect Guild Building & What other advantages are there?
Chara system would be effecting the type of guild you are building. The more Order players, the stronger your Order Guild skills will become, Not to mention the type of guardians and locations you can take over.
The type of Guild that takes over more regions or a certain location, will also effect the world that players are involved with. Example: If Payon is owned by 60% Chaotic Guilds then the prices and treatment from NPCs to common Light Players will drastically effect them. Starter Jobs will not be effected by this.
This is all still in the testing phases since the development team needs to see if this can be abusable, or not - based on the conditions that are currently set for it.
Will my job change if i'm Light or Chaos?
Yes your job will change. Depending on the side you choose you'll become a new type of class with new skills unlocked.
Can you tell us more about the Duel Jobs?
"Duel Job System Classes"
Alchemist
Chef
Blacksmith
Tailor
[4 more TBA]
This is still in the development stages to actually see if it can be a final design aspect for RO2.
You won't be able to just jump in the middle of battle and change into a Blacksmith, you'll be able to USE your blacksmith skills from the skill tree though. Outside of battle, you'll be able to change into a Blacksmith and take advantage of all your Blacksmith skills, while still obtaining and using SOME of your main job skills. You can still go back into battles as your Blacksmith - but remember your now limited to using some of your main job skills or weapons.
Tell us about the NPC system, I don't get it? I need to see how you can customize your "offline NPC" and how the user interface behaves, as I've seen how organized shopping makes a game more pleasurable and even helps the in game economy.
NPC's offline functions are pretty straight forward, as you'll have a whole array to different assets you can choose from. You can vend, forge, create, bake, the whole nine yards, just by selecting the pre-set options available. Prices for your NPC's services will vary as there is a Suggested price you should charge, but you may go over or under that. If your NPC is creating something for someone, the customer will select what they need from your NPC, allowing them to see your level skill for that creation as well. If your NPC if offering Users 1/2 the requirements [EX: Empty Bottles] then all they'll need is the rest of the requirements. If they meet the requirements, then Ta Da! You've just created white potions for your customers.
Once your Empty Bottles run out though, that option will be lost for future customers so the rest will be stuck providing the Empty Bottles, until you log back to hunt for the rest as a service to your customers. Of course though, this is one of the many options you'll have upon Release.
What will happen if I D/C in a battle? Will my NPC start crafting next to a boss?
If your worried about what will happen if your in a middle of a battle and you suddenly Disconnected, your place will still be saved and your NPC will not be activated until you active the NPC in a safe spot. It's a whole separated function that you must set, just like Vending in RO, but imagine logging off while vending and your Still making Zenny till your shop runs out. Once you log back in - you'll receive an invoice of your transactions and continue your adventure.
You said Acolytes will look like the NPC picture, what happened?
I never said thats what they'll look like 100% i said expect something similar, I'm not authorized to actually say it or not at the time. Designs of your outfits are not out of the question either - it's just RO2 is offering the newer design since time moved forward for Mid-gard, Knights even bare a slight resemblance to the Lord Knights.
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Edit: I'll finish this post later - I'll be adding some more Q/A's and Screenies to share later too.