Has SE totally dropped any more development of the Adventure Squadron?

[AnotherPerson]

I think they said at some point that they made the trusts that slow to make sure people keep running dungeon with other players instead of NPC ( but, if so, why add the trusts in the first place )

Because there are times where trusts are more preferable than running with players. Example - when you want to progress with the MSQ or level up but it's the dead of night (because that's when you have free time for that week for whatever reason), the DPS queue is most likely not going to pop for high end dungeons as majority of the players are asleep, so you will be sitting in the queue for 30 mins to an hour. Even tank and healer queues will take a while if it's a high level dungeon because there aren't many players on and those who are aren't all running specific higher level dungeons. At that point, a trust is more preferable even if it's slower.

Trusts do help for players who never experienced the dungeon before to learn the mechanics on their own - because the trust party members will generally do mechanics first and then DPS/heal after. It's also a good way to learn and play at your own pace compared to DF. While this is an MMORPG, I am glad there are alternatives if people don't want to play with others for whatever reason and glad that while solo alternatives like trust would work, they aren't the most efficient because the devs want you to play with people to keep the game feel like an mmorpg.