From what little testing I got on it tonight it felt pretty good. You need to plan your road if carts are going to work on it with any reasonable amount of success. But if it does work, then, with horses, barges, and whatnot, it might not be a completely unworkable system. As the crow flies, at running speed (speed three), it should take 18 IRL minutes to cross a supergrid. Assume horses can walk at above that with cart carrying ~16 objects continuously... assume boats could go that fast, and carry even more. You'd need a better river generator, probably, but still. You might even want to make it even easier to walk along paths, and have shoes and whatnot impact that walking system. You'd have to travel, but at least you could sit back and enjoy yourself while the landscape swooshes by. Plus you'd have to actually build roads! And there could be robbers and highwaymen. Caravans, stage coaches.
But I guess we should see if baby can walk first.