(This is a quest I made for this cause I have nothing else to do and I want to support this project the poor person way, but I hope my idea is at least taken into consideration. If I make any format mistakes, it's because I am basically clueless on how this works.)
Will need conceptualization. A simple flyover of TR and/or Vanilla landscape with Daedric text overlain would be best, as in the OG Morrowind cutscenes.
Prior description, which is not deemed workable any longer in the spoiler below:
This is not a quest, but a voice-acted scene at the end of Seeking Their Counsel.
The player meets Alvu and Simine in Necrom's basement. Eagerly, they being the ritual to summon Alandro Sul through the four ringlets. However, they are interrupted by Verendas Hlervan, who says they are committing a terrible heresy, and it is his duty to put a stop to it. Somewhere in here it should also be discovered that the Nerevar bonewalker has mysteriously disappeared from the room as well.
Found along and near Veloth's path, Aeolian Gourd Harps attract wayward spirits to Veloth's path, from which they can continue to Necrom to seek peace. Locals often place bones at the base of the harps in the hopes that pilgrims will carry them to Necrom. The model should generally blend in with Velothi architecture.
Wanted: Temple faction quests to go into Almas Thirr, to accompany these (http://tamriel-rebuilt.org/claims/speaker-dead-questline-parent-claim) as low level quests. These should have a thematic focus on the Thirr River conflict, and should be kept relatively simple, easy, and restricted to the Aanthirin and the surrounding regions. Also included should be information on the purpose of Almas Thirr in our canon, plus what the bloodstone shrine is.
Similar to the Pilgrimage of the Seven Graces, TR has currently six pilgrimages, with plenty of room to expand from there. Pilgrimages are primarily used both in vanilla MW and in TR to give players an excuse to wander through beautifully crafted exteriors they otherwise wouldn't have a reason to. While this is an admirable goal in itself, it also helps if the trials are a bit more involved than "bring x to shrine get buff quest complete".