In the topic "someone in particular" Hordonia Varian was mentioned twice in one dialogue.
"I would most strongly recommend speaking to the duchess. Her insights are often invaluable. Ladia Tunifus is the head of the cult mission. Herdonia Varian is Captain of the local Legion. Galan Brandt is Guildmaster of the local Fighters' Guild chapter. Gindaman heads up the local Mages' Guild. Herdonia Varian is the Captain of the local Legion forces."
There are no trainers in the Legion Headquarters in the Ebon Tower. There are named people who stand in place with no extra dialogue like they are trainers, but offer no training services.
The door which opens after solving the Test of Disorder appears to be closed again if you save, restart and load the game. I use Steam version of Morrowind; TR_Mainland + TR_Travels; MGSO + couple of minor mods (Apel rain replacer + Delayed Dark Brotherhood Attack). I understand that it may be the issue of mods incompatibility, but it's too unhandy for me to check it using only Tamriel Rebuilt. :D Here is the video for better issue illustration:
The completion of this quest checks for 20 wooden tokens and 20 brass tokens, but the corpse of Cyrtus Clagno has 30 brass tokens and 3 brass candlesticks on it. It would be helpful if there was some kind of journal or dialogue prompt which encouraged you to search the dude's home after finding that he doesn't carry all the tokens on him, or as Why suggested if you could turn in the quest with just the brass tokens, with the implication that Felmo Ilveroth would have Cyrtus's home searched by lower-ranking laypeople to see what else he had stolen.
Felmo Ilveroth recognizes you as Arch-Mage of the Mages Guild when he sends you out to convince them to support the cult, but doesn't recognize that you merely pulled rank to solve the quest when you come back to report the job completed. Instead it references whatever the non-rank version of the quest solution is.
There's a banner hanging over the door to the tomb in the Akamora Temple. Seems like a reasonable thing to do for a hidden(ish) door, but surely the tomb door shouldn't be hidden from those who wish to go worship their ancestors.