[GranitePenguin]

Why some (seemingly obvious) units were left out is probably in that list of decisions we will eventually get to see. It probably isn't a rules thing, since the rules are pretty modular and already exist. It feels more like an art budget question.

But again, that goes back to the timeline of when certain things came into being. If you design chronologically, you would get everything that was in Ogre and G.E.V., but that's obviously not how it was thought out. The ODE rules were taken as a whole and units were picked out of that combined resource, where their "historic" placement doesn't matter.

I'd be very interested to hear the thought process on unit selection.