Having spent some time in cyrodill I can say this one thing is something that should be looked at.
Horse knockdown.
Its simply not fun and when it happens you have a very large chance of dying.
I can tell you most people I hit get 4 spells in the face before they have time to recover and in 98% of the time I kill them. Yay free kill.
You could say this is realistic, if you get ambushed you should be killed. Maybe but that dosnt make the game any fun.
Just dismount players. No knockdown. It would 100 times better then what it is now.