When asked about duties, generic response in Akamora Guild of Mages is "Speak with Areanne Vara."
This is not quite correct, as Areanne Vara is in Helnim.
This dialog option has no location assigned to it, so NoLore mages everywhere could point to Arenne Vara, if they have no other overriding dialog options.
I accepted the quest in Andothren. Then went to Menaan and set Engor free. When I went to Vando Manor Dathlyn Vando was already dead - as expected. Raynil Vando had no appropriate dialogue. Is this a bug, or a "You can't do it in this order"?
I tried AddTopic "pack of alits" which didn't give a "Topic not found" error but didn't add the topic either.
Balyn Ilvenes in Indal-ruhn still has a 'Services' line that implies he offers boat travel, even though he's now just a dockworker and provides no services: "Rolis Hlor over at the west end of town has a nice selection of everyday wares. For anything more specific, you'd want to go to Almas Thirr. Want a ride?"
However, there is also TR_m4_TT_ArmunAdventure_e, but the name of the quest is different, just "Troublesome Orc" without "A". Therefore, it doesn't get hidden from the journal when the quest is finished after inviting him to join the temple.
Ogn in Wetstone Tavern in Gah Sadrith has a Bloodmoon head. Him and his mate Thorhalla (lol) also have the weird purple-ish hair that I think is from Bloodmoon as well, but I'm not certain.
Near Bodrum, in Roth Roryn -14, -18 area, on top of the river near the wooden bridge there is a huge blue arrow visible in-game. It's not visible when you play OpenMW game version, but it's showing up if you play Morrowind on Steam (I've changed versions during the same playthrough).