Though I think having women relegated to healers is one thing I don't think so much on the physical/magic side of things. There isn't a reason to portray females as physically weak, but portraying them as physically equivalent to men is imo a knee jerk reaction the other way. Assuming that males and females are equally adept at magic and that males are more adept than females at physical jobs you would expect to see a far higher prevalence of mages being female.

I have no problem with a game imposing the idea that men and women are of average equal physical ability as part of it's structure, but the idea that having men more physically apt isn't sexism it is just realistic. There is a reason that every sport separates men and women, and that the mens is of a higher level. This is no reason for females to have a stereotypically weak personality, or to be just plain weak, but I am willing to take a stand and say that making physical 'classes' to be more typically male isn't sexist, it is realistic. Whether you want to make the game in this manner or opt for a suspension of disbelief in favor of egalitarianism is a choice of the developer and I don't begrudge them either way.