Questing will be just as indepth as crafting in riftwalkers. They will go hand in hand. There will be four types of quests:
1. Set quests to help build lore and also for the newbie player guide.
2. Randomly generated quests throughout the game.
3. Player created quests. This is where questing gets immersive. Im aware that alot of mmo gamers love questing but complain that they become to repetetive. This is where player created quests will come in. For instance a player could create a quest and give it a reward, an item or gold. The person creating the quest would gain something and so would the successful questor! This will also help drive the player created economy.
4. GM created quests on the fly, to help push lore, new events etc.
Lets take for example, you cant be bothered, or dont have the time to gather some resouorces. Well, you could set up a quest for another player to pick up. You cant have dozens of players picking up the same quest, only 1. Also id think you cant 'duplicate' the same quest, as this would be farming players.
Not only will you be able to create the standard quests found in most mmo's but you will be able to create group quests, for instance if you need a kill a specific monster to get ingredients for spells then you could set this up as a quest and let players sign up to it.
The quest system interface / tools for developers would be prominent here. Enabling players/GMs to set up quests quickly.