I'm working on my WIP - Grandmaster of Hlaalu 1.3. It will add a quest for the grandmaster, for once he/she gets there. The grandmaster quest will be to locate a shipment of scrib Jelly for Balmora. The other quest comes from Vilvan Andrethi, new governor of Caldera. The previous mods added him after Odral was arrested.
I do plan to make some quests for the Vassir-Didanat Ebony Mine that the player acquires previously. During the Stage Four stronghold, the Mine changes from Vassir-Didanat Cave, to Vassir-Didanat Ebony Mine, and the equipment is fixed where it was broken in the cave
The Mausur Caverns quest changes totally, House Hlaalu doesn't get to own that mine. During the quest from Vilvan Andrethi, he asks you to talking to the Redorans about leaving the Caldera Ebony Mine alone, when you talk to the Redoran Councillor, he gives you the evidence of corruption that you need to help Vilvan Andrethi. Once you hand Vilvan Andrethi the ledger, he asks you to free the slaves then go talk to the Redoran Councillor. Once you talk to the Redoran councillor, the changes occur at both Mausur Caverns and at the Caldera Ebony mine and that ends the quest. Once the quest is ended, you can talk to certain people in Caldera about "Councillor" (Imperial, Argonian, Breton, and Redguard), it mentions the changes at the Ebony Mine and mentions House Redoran. I also added a Hlaalu mage to the Caldera Gonvernors Mansion that can send you to the Caldera Ebony Mine.
I added a basemant to the Rethan manor that the player gets at Stage Four of Stronghold, in the basemant is a kitchen area which has a House Cook, and a House Maid, a trash room, and Living Quarters which include sleeping areas for the new retainers as well as a Shrine to Nerevar as well asa a Hlaalu Priest which sells Spells, does Spellmaking, and enchanting. I also added a House maid to the upstairs, and I plan to have her greet the player the same way as the one in Oblivion does, as well as offer food and drink to the player. The scrib jelly quest, starts from a notice in the Rethan Manor basemant Kitchen
Some of the stuff that I used as well as quest ideas came from the Pax Hlaalu mod, except for the Caldera Governor quest.
That's all the information that I have now. I'm sure I'll come up with more later. As always comments are welcome concerning the planned quests, etc.