Mounted combat is so unneeded, it's staggering how many people want it.
Yes and no. Yes, Mounted combat is unneeded only because of the limited and convoluted terrain. Then again, the reason why so many people are wanting mounted combat is because is logical that in a medieval/fantasy-like world like Skyrim with warriors, swords, horses, etc., one would expect to have mounted combat at least sporadically . I personally don't want mounted combat perhaps even horses in Skyrim since the terrain is so twisted which makes the land even smaller than what it is.
Anyways, if Beth wants to implement mount combat in the future they should look at a franchise that has innovated mount combat better than any game developer out there: Mount & Blade(Warband). That game is simply remarkable in the mount combat. Is no big wonder why they have "mount" in the title of the franchise. This company really knows what a "horse" is. They have capture its personality perfectly. I guess is because the company is Turkish and the horse has been, one could say, a symbol, a tradition of the Persian world. They said that for many centuries the most coveted and elegant horses were/are the Arabian horses.