It was either "Sixth House (Reborn?)" or "Great House Dagoth". I have no experience with either mod, but they're both supposed to be good. I'd definitely install one for a second or third playthrough if you've already done the main quest.
I've asked this before elsewhere, but are there any leveled list addition mods that aren't garbage? I think Morrowind Advanced was about the only one that I liked. The rest pull stupid bullshit like "Make a new leveled list containing everything in the mod available at level one, then stick that list into one default list!" or "Add a shitload of custom leveled lists that crowd out every other available item!". To fix this kind of shit would require far more time than I want to put in to add additional armors and weapons and shit. I also don't want mods that add a shopkeeper you run to to buy new, overpowered mod loot, I want them added to the leveled lists and at least be somewhat balanced. Why everyone adds their own shopkeeper I'll never understand considering the leveled lists are already there and ready to use. Again, deleting custom NPC's like that and adding whatever was added by the mod into an appropriate leveled list is fast, but it takes quite awhile to do that with 100+ mods.
I guess this is the reason I don't play Morrowind anymore. I'd love to go around dungeon crawling again, I just already know about everything there is, so there'd be no sense of discovery. No discover=boring game, maybe 5 hours of enjoyment, tops. And I also don't want to put in 20 hours of work to enjoy the game for another 10-20 hours or so. Not a good use of time to be honest. I might do it if there's already a well-constructed leveled list mod to base everything off of, that would help immensely. Maybe my standards are too high, but really, if you're not going to do the mod right, don't make it at all.