Ninja: Walk in shadow.

[Izsha]

All classes already have 3 quests. 1 at the counter (so you want to be a weaver?) Hit yes and quest finishes. Then a 2nd also at the desk that ends with you talking to the guild master and getting your weathered weapon. Then a 3rd which you get once the weapon is equipped (kill 5 marmots).

Mystery unravelled.

[Leonus]

All classes already have 3 quests. 1 at the counter (so you want to be a weaver?) Hit yes and quest finishes. Then a 2nd also at the desk that ends with you talking to the guild master and getting your weathered weapon. Then a 3rd which you get once the weapon is equipped (kill 5 marmots).

Mystery unravelled.

This makes way too much sense.

Please stop.

[MartaDemireux]

All classes already have 3 quests. 1 at the counter (so you want to be a weaver?) Hit yes and quest finishes. Then a 2nd also at the desk that ends with you talking to the guild master and getting your weathered weapon. Then a 3rd which you get once the weapon is equipped (kill 5 marmots).

Mystery unravelled.

Actually that's incorrect. Level 1 "So You Want to be a [Class]?" -> Level 1 "My First [Weapon]" -> Level 5 quest. At least from what I remember and what every wiki seems to say. Rogue gets an extra one that is only available to Rogue. The other Level 1 quests are available to all classes/jobs as they are the unlocking quests per usual.

I believe you are confusing the level 1 sidequest that most (maybe all) guilds have present in them. However they are not class-exclusive like this new level 1 Rogue class quest is.

It's likely for additional lore to explain their sudden addition to the game (as said players don't need to be caught up with the main story to play them).

As for the 2nd level 15 and level 30 quests - they are likely just to give more lore and a weapon like the ACN additional level 15 quest did. Ninja's extra quests may be this same thing.