So, I've been thinking about this for a few years now.
One of the things I enjoyed most about the old original Morrowind game was that I could join one or more factions within the game. We have a little bit of that here, with the Mage's Guild, the Fighter's Guild and so on, but there's a whole bunch of other factions that could be added to the game. For starters, there are:
Great House Telvanni
Great House Hlaalu
Great House Redoran
Great House Dres
Great House Indoril
Great House Dagoth*
The Tribunal Temple
The Knights of the Flame
The Knights of the Dragon
Clan Aundae
Clan QUarra
Clan Berne
Clan Volikhar
The list goes on and on. Each faction would have its own particular set of skills. Most of these would be passive, but each would have TWO active skills, derived from the particular nature of the faction. For example, the Telvanni are known as wizards, living out on the islands of Vvardenfell's east coast, so their two active skills might include a water walking spell (who wants to get their robes wet walking from place to place), and a spell to summon a familiar or perhaps a slave.
There might also be limitations on the factions. For example, the Telvanni and Mage's Guild don't get along, so they might limit your max level in the Telvanni faction if you're already in the Guild.
In any case, I'm just putting this out there, to see if there's any interest. If there is, I'd be happy to start working up a skill list for each faction I can come up with, for submission to the devs.
Let me know what you think!
Exploring Tamriel since 1994.