So, is the problem that video game female heroines are too delicate or too butch? My opinion is that the answer is neither and both. The problem with video game female heroines(and it's true for the video game male heroes, as well) is that they exist primarily in only 2 infinitesimally narrow bands of possibility. The fact is that in real-life, you find females that are the princess-type, and you find females that are the butch-type; so, it is perfectly reasonable that these types should exist in the game. However, in addition, you also find a vast spectral band of female's whose personalities span a continuum in between those extremes and then pierce, fractal like, into a direction normal to the spectral line. Video games, so far as I've seen, have failed to explore this vast middle region of the spectrum, instead, focusing on two specific possibilities.
With male heroes, the situation is about the same or potentially worse, depending on how you view the situation, because the male hero is usually restricted to 1 possibility depending on the game's cultural origins. In the western culture, the male hero is usually the gun-toting, apathetic, foul-mouthed, over-muscled bad-ass. In the eastern culture, the male hero is usually a weapon-toting(they like more than just guns) effeminate, but his personality is choice of apathetic bad-ass, neurotic mess, or caring affectionate. In comparison, the 2 possibilities for female heroines seem to occur regardless of culture.
In either case, video games just don't do a good job exploring the possibilities of the human experience. It is this lack of exploration that has made video games difficult to take seriously as an artistic medium because the industry is not allowing video games to BE an artistic medium(note that I am implying video games are every bit capable as an artistic medium; however those making video games have so far, in my opinion, with a few noted exceptions, failed to use it as such).
(After writing on this a bit, I realized there is a third female portrayed quite often in video games, the porn-star. That scantly-clad, voluptuous, dominatrix vixen who is there for no other purpose than to pique the testosterone of young male video gamers. While such women do indeed exist in real-life, it is an overly abundant character in video games.)