The cult of Arius is outlawed and heavily persecuted. The dome is inhabited by peasants who joined the cult during the Simulacrum and can't return home now. They supply their hunting with banditry and keep away from the keep, where the cult proper is hiding. Could be non-hostile.
Ancient council hall of the Waters March, which once controlled a large swathe of southwestern Morrowind. Its main chamber would be the council hall itself. There could be subterranean halls leading to chambers for visiting council members, with an itinerant Indoril acting as advisor to the council as a possible resident.
Download latest addon for the council hall shell mesh.
An ancestral tomb is being used as a skooma den by escaped slaves and their associates. The player has a wide range of options for resolving the issue; by either placating the slaves and abolitionists, or the tomb guardians and Hlaalu populace. These options include unleashing the undead on the slaves and escorting the slaves to safety or returning them to bondage.
Reward Unique guar toy with passive effects when held by player? Or a small bit of gold and the progressing of the questline if part of a series of quests.
Short Summary Help this Hlaalu noble get an advantage over a rival of his.
There's also this line from a Thirr Valley meeting summary: "Velothi towers - some might be overgrown with critters or bandits, others might be non-hostile with non-Temple-affiliated scholars ranging from Dissident Priests or other such freethinkers, more or less accepted by the Temple, to Baladas Demnavi-type individuals, one will have a DB cell"