[tomc]

A quick observation: Treads factor into movement, which with guns, determines the effective attack range of the Ogre.

I think it's implied in the design that an Ogre of a particular size needs a certain number of treads to reach a certain speed. So, fewer treads would mean slower movement, less effective range, and less deadly.

Others can (and probably will) crunch the numbers to a fine powder, but that's my gut reaction.