@OP: Did you consider the fact they were meant to be inferior to real-player parties, to encourage party play?

For me, they certainly still get the job done with the occasional AI goof, but I'm good with that if I'm running a dungeon + watching netflix or doing laundry and might have to afk mid dungeon. Wouldn't do that to real people and am very grateful for this option.

My wife is extremely nervous around unknown people IRL and in game and doesn't really "do dungeons well" with pugs, so for her the Trust system eliminates a huge headache of arranging times with FC members to do the dungeon/trial together.

So, I'd say "working as intended" and "very appreciated addition".