I'm actually starting to warm up to the idea of a unit creation forum. The chief compliant I had with the unit creation idea would be the amount of micromanagement that would be required to individually create units. However, I feel that I have come up with a good system to get the benefit of unit creation (flexiblity) without the micromanagement.
With the current game, you can really be screwed if you are lacking an important resource. However, a unit creation system can allow good units to be created without an important resource.
Here's how I think an ideal system would work:
1. Unit Creation Workshop- New units could be created. A basic unit would be created.
A. then a vehicle type would be added, example truck, chariot, horsemen, foot, etc.
B. weapons could be added: spears, muskets, rifles, TOW rockets, longbowman, swords, etc
C. Abilities: airdrop, amphibous landings, etc
Sea and air units could have similar programs.
Ocean examples:
A. cargo, combat, submarine, hyrofoil, etc
B. fire bombardments, cannons, missiles, etc.
*Each of the additions would add cost additional shields to produce.
*Technology opens up these options.
2. This would become a "standard" unit and would be added to your production list. Therefore, it does not require micromange of setting all these unit characteristics for every unit but merely once and for all. It can really help civs that are disadvantaged from being running over because of the units they are able to create that do the job of a more advanced unit but with older technology. For example, transporting TOW missiles by horses which can be the equivalent of a tank in some situations without all the armor costs.