I'm annoyed. In two of my playthrough NONE of this happened. I have never seen an abduction cutscene in the sewers or at camp; Yenna just vanished one day. A companion was abducted, it was all very weird without any sort of cutscene or explanation. So much stuff has been missing from these two playthroughs...
The game has a lot of bugs. My Barcus I rescued and talked to in Grymforge and promised to help free the gnomes at Moonrise went with Thulla to the Myconid colony. He's supposed to show up at Last Light Inn in Act 2, never did for me. Rescue Wulbren, mentioning Barcus sent me, Barcus is nowhere to be found. I explored every single nook and cranny of the Act 2 map, so I know Barcus didn't die. What's more, I get to Act 3, go to the Ironhand Gnome hideout, find Thulla there, but not Barcus, when they were the same group of gnomes rescued at Grymforge. Thulla cannot even be talked to, I click her and nothing.
I take Wulbren's Runepowder bomb, save all the Gondians in both Throne and Foundry, use the rune powder bomb on the foundry, everyone lives, Wulbren wants to go full racist on Gondians, I talk him down, he walks away angry. Barcus nowhere to be found.
BUT, the journal tells me Wulbren has been deposed. Impossible, you can only depose him with Barcus present, so the game is assuming Barcus is alive and present in Act 3 when he disappeared since Act 1. Bug confirmed by other people on reddit. Really narrative breaking bugs.
Then there's the whole interaction with Gortash after throne/foundry where you have to use an invisibility pot in order to not trigger a perma combat bug and be able to have dialogue with him pre-encounter. And even then, the nobles talk and act like pre-Gortash coronation.
Act 3 is a mess, luckily my messes were limited to those two, not more aggravating ones like companions quests, etc. They really will need to revamp Act 3 imo, it's just a narrative mess and all that Orpheus derailment did was make things worse. I really feel like a repeat of DOS2 pre-definitive edition.