Since we now have a courier horse and a warhorse. I think having a draft horse would be nice to have. It could be used to better pull carts over terrain and go uphill better. Think ATV horse with 4 wheel drive. Of course it won't be as fast but maybe have good stamina. I think it will also allow for other items to be developed as well. Like a Horse carriage that can hold x amount of players, a plow that requires a draft horse and can plow faster, even a larger horse cart that can carry more items. Maybe make it where you can use two draft horses for faster speed or bigger loads.