I like the idea of transport in the game, just not motorized. I don't know if there is a back-story reason for there being no motorized transport in game, I like the thought that complex machines are considered a taboo...after all that's what got the world in the state it's in. I take the approach that technology is only considered good if it is required for survival. Horses in Oblivion worked fairly well and it shouldn't be hard to transfer the mechanics of it to a Brahmin...that would be enough to reduce the speed to faster than running, but not so fast that the world shrinks too much. Combat from the back of the Brahmin would be tricky though, and stealth would be impossible, so maybe it would be enough to strike a balance.