I won't give up on 1upT. They must find a way to teach the AI how to use it. On the other hand there is no good reason not to allow civilian units to stack. A suggestion a friend of mine had may work as well. Allow civilian units to stack (but not combine labor) and in addition to this allow military units to "pack up" for long rage movement. They would be vulnerable to instant destruction as civilian units, but they could move cross-country much more easily. It should take a turn to pack and a turn to unpack. They should have a -75% combat penalty the turn they unpack to prevent any tactics from evolving around packed units. They could use little baggage trains in early eras and military trucks in later eras to represent packed units.