And you still haven't shown me how there's any more non-factional Dunmer culture than Imperial culture.
Why should I ignore the bulk of Morrowinds culture when Cyrodiil has nothing to match it?
The Great Houses are the mayor cultural influences. Their equivalent in Oblivion by lack of any sort of families, clans or cults, are the cities. Though they don't seem to influence much at all.
Can you write a short philosophy of each? Like http://www.imperial-library.info/mwbooks/grasping_fortune.shtml, http://www.imperial-library.info/mwbooks/truenoblescode.shtml or http://www.imperial-library.info/mwbooks/affairs_of_wizards.shtml?
Like wise the temple is a major influence. In Oblivion, the Cathedrals look nice but you don't get any http://www.imperial-library.info/mwbooks/fellowship_temple.shtml. Or further reading, http://www.imperial-library.info/mwbooks/saryoni_sermon.shtml, http://www.imperial-library.info/mwbooks/lives_saints.shtml, http://www.imperial-library.info/mwbooks/pilgrim_path.shtml, http://www.imperial-library.info/mwbooks/consolation_prayer.shtml.
The blurbs about the Amulet of Kings are nice, but that doesn't tell us much about everything else involved with the worship of the Nine. Knights of the Nine was excellent even, but that came with a DCL.
The Ashlanders also are a big thing. So I'd also expect allot more on the Colovians and Nibeneans, but perhaps you can write something like a http://www.imperial-library.info/fsg/luagararticle2.shtml about them?