IMHO, a change in horse size may require an adjustment in the hit detection mechanism/code and also may require changes in animations. I don't think it's that easy to do.
It'd be a good thing to have horses in various sizes but the lack of it certainly don't spoil the game.
Yeah, sorry. It kinda seemed like you were changing the wording there because the poll was my idea or something. I guess I overreacted a bit, my apologies.
Who cares about different sized horses? I've seen impressive mods based on the current horse skeleton,
like fantasy creatures (The Last Days e.g.) or the warelephants in Hegemony.
No, I'd rather have different sized two legged animals: Dwarfs and giants, please