So I did the part of the quest I linked above to explore the area all the souls are in and wanted to post my findings…well, what little there is.
The quest involves you going through a 3-floor Torghast, which isn’t particularly hard if you’re careful and have decent gear. On the third floor, you have to beat up the boss in order to open a portal that will let the souls show up in two separate sections. It looks like this:
There wasn’t much else remarkable about the room from what I saw, but both sections look similar to that above. The yellow glowing soul is the one you need, with Lana’thel’s soul to the top right of it:
Uther’s soul fragment is the only one you can interact with. You can mouseover the souls to see what the titles are, but you can wave your mouse and click with the fury of a thousand chipmunks, but you can’t do anything to any of the other souls there. You can’t even target them. And no, I can’t just take another soul instead of Uther’s. The game doesn’t allow it, much as I’d love to just ditch Uther and work with someone else instead.
Speaking of, the whole point of coming here is to get a fragment of Uther’s soul. Apparently, when someone is killed with the killer wielding Frostmourne and rage (as opposed to mild irritation), it shatters the soul into fragments. I haven’t gotten far in the questline, but I assume I get to play Tetris with Uther’s soul to make him feel better or something like that.
I assume the other souls there might be in a similar boat…though I don’t really know why I can’t collect them. The less souls the Jailer has, the better, and not all of them are bad people. Surely the Venthyr can do something with the bad souls, with a talking down to followed by a pep talk or something. But no, they just get to float there and…maybe get read some bedtime stories by the Jailer or paraded in some fancy fashion show with pink bow-ties and tea parties or something, Your guess is as good as mine here.
With regards to Lana’thel, it would’ve been interesting to be able to take her soul (actually I don’t know if this is her whole soul here or just a fragment of it) with you since Kael’thas is in Revendreth. She was, at one point, part of the group he took with him and was a follower of his. Granted, it’s likely she and others didn’t know he would betray the Blood Elves in the future, but it would’ve been an interesting opportunity to see how she was before she was turn into a San’layn, since there would be more to her than when she was being controlled by the Scourge, and also seeing her interactions with Kael’thas (which could’ve tied into his redemption storyline). Maybe it could’ve lead to San’layn from the living world having a more active role in helping out the situation. Who knows? It just feels like another missed opportunity I can toss onto the massive pile of disappointment.
Maybe when it comes to saving souls, I want to give a bit of heart to go with it, but that’s just me:
Anyway, there wasn’t much else of interest I saw involving that questline. I still need to go turn in that quest and see what all the campaign questline involves. I assume I just jam it back into Uther to make him whole again. That’s how it works, right?..maybe it’s a good thing I’m a Hunter and not a Priest.
As always, I’ll keep an eye out for anything else of San’layn interest to post here. 
