As a vet (1998-2003) from a combat arms MOS (armor crewman) my only concern, during that time, would be that everyone on the vehicle has to pull their weight. It's a lot of heavy lifting and the like. While I'm not saying women are weaker by any stretch (my wife is proof of that!), I am saying that I'd hope that the military would raise PT standards for women serving in a combat arms MOS to something a lot closer to the male standards.
If they want to fight, I'm all for it, as long as they can keep up to the standards we have in place already.