Not really. You can still force it to run on more than one core (and also make it large address aware), but this is no multiprocessing in it's true means. It divides the workload, but EaW pretends (and acts as if) it is running on one core. The engine is not the best ever built, and pretty old (older than EaW itself), So no easy and for a simple modmaker legal way to tune it.
Lack of ground combat is pretty much a dealbreaker. If we weren't interested in it, we could have moved to any number of space 4X games before now.
I was rather disappointed when I read that they wont include it. I think having both space and ground combat was the major bonus EaW has over all those 4X games. It made it truly unique and entertaining. (even though the ground combat processing part of the engine was poorly built)