We have not received permission from Noaani to share the quoted post.
But the point of an open world dungeon is to have value to the content within the dungeon, not just the boss.
Now I don't think we've gotten any detailed info on mob drops (especially in dungeons) and I don't know how it was designed in AA, but when Steven talked about his favorite dungeons in mmo the first one he mentioned was Lair of Antharas from L2. And there you'd have mobs that had valuable loot, you had several bosses that had good loot (iirc they were on a 24+-h respawn) and you had one of the biggest epic bosses in the game at the end of the dungeon with a week respawn (or maybe even bigger, I forget).
And guilds would take up a few rooms to farm those mobs, they would check for bosses when their timers were coming up and they'd fight amongst themselves for the right to farm all of that.
Unless there's gonna be some repeatable quest that provides you with the same kind of mats that mobs in AoC's dungeons drop - you'll most likely be farming those mobs to get those drops. Well, not necessarily YOU you, but the general you that is players who want said drop and have the time and capabilities to farm it instead of just buying it from others.
That is what an open world dungeon means to me. If you guild is ok with visiting this kind of dungeon only once a week when an epic boss respawns at the end - that's totally fine. And if you manage to somehow farm several bosses on your way to the epic boss, even though their respawn timers will most likely be staggered by the other guilds who're contesting them - that's also cool.
But imo, if Steven wants to have real open world pvp and "soft friction" between people - that's the kind of dungeon he'd need to have in his game, and I'm pretty sure he knows that. Because if all the open world dungeons are just a "go through it once and forget about it for a day or several" - the only friction between guilds would happen on caravan runs and maaaybe from killing innocent gatherers that were just minding their business.