Accepting the quest in conversation with the questgiver NPC does not add it to the journal and you cannot enter the quest through area transition - it does/says nothing when you step on it.

We just did the quest with Theobald and it seems all good.

It seems the Firebrand scroll has been removed; I have not checked the others but there seem to be a few less lines of scrolls in the shopping window. Can it please be returned, as well as the others that may have disappeared?

ShadowRealm said Inowanna had taken them out because they were selling at 1/3rd of of the regular price but when I was buying them, their price was exactly like the price of other circle 5 scrolls so something must have broken it?

Regular 4th circle Shadow Conjuration is also missing.

In the ascent area, many traps do double-damage and AoE to others nearby. This can be very dangerous and given that most of them are near encounter areas, can lead to unfair deaths.

Yeah, that's certainly not "right next to each other". Yesterday I visited and there were duergar spawns in one corner of the Pyre room and the fire giants in another opposite one diagonally, but they would still be manageable to fight separately with a little care.

And it was much nearer each other compared to what Emoteen describes.

I assume they were two separate encounters, then?
Normally there is one encounter there, one encounter back, but I did experience two or even three before.
Seemed risky but manageable most of the time if you go down prepared. There was only ever one death I experienced (Spiffy).

I have tested the updated and moved quest.

Did it in two with Poppy yesterday. It was a change to the better for sure, two things that make it less fun now: no big clustered spawn(s) anymore to enjoy an AoE on, and the big backspawn scare does not have a substitute.

Also, the second spiked barricade in that winding corridor after the tight spot passage does not have any monsters/spawn behind it so it feels somewhat redundant.

You can open the doors to the Library building (opposite the People's Palace) but when you try enter, it says "The Library doors are locked today." It would be simpler if the doors were locked in the first place.

There is effectively no loot to speak of in this quest except in the final chest. It would benefit from a bit more reward.