Seriously though mayne, the Ash would kill horses, there is almost no grass for them to thrive off of.
Yea that's why i'm saying there would only be a handful in the use of the legions and no other major faction. So the Dunmer houses would have guars etc and the legion would have a few horses for scouts, relay message etc. They'd have some grain/grass stored for the horses.
I dont like the idea of lots of horses, but the idea of having a handfull for highranking Imperials or nobles wouldnt be to bad. But if you did introduce horses as a common form or transportation, it would introduce a new form of trade (Live stock, Grain etc) Just a thought.
Your right on Gothren, but wrong on the Ash storms, your thinking of the Blight. Ash storms persist.
As for cliffracers, I [censored] hate the things, but if anyone feels they should exist, or their that important to them, I don't see where it'd be such a big deal that we'd have to worry over it.
What if the cliffracers are there from the start.. But like most animals they migrate once they sense the impending danger that is the Oblivion invasion? It wouldnt be a bad thing.. Certainly would introduce a certain amount of confusion and curiousity about where they buggered off to. Maybe they left for akavir with the Neverine.