Here is an interesting observations on how BioWare and CD Projekt RED handle gays/lesbians.
*snip*
I think you are looking too much into their sexuality and its meaning. Furthermore, labeling the characters as villains and into dichotomy is a disservice to the Witcher.
While Henselt is a very entitled individual who displays a total indifference to treaties and even justifies rape simply b/c of his royal status, he does portray a sense of honor (which is showcased in the massacre caused by Sabrina) and a small touch of camaraderie between his soldiers. Philippa, while indeed seeks to establish as much power as possibly for her by almost any means necessary, does have the North at heart and ultimately wants to preserve and enforce peace in the lands through international treaties. Her aid with Saskia to create an egalitarian meritocratic state in the Pontar Valley is genuine, but of course she would be in control of its administration, while Saskia would be more of a beloved figurehead. Dethmold I can agree on to be more on the despicable side of characters in the game, since he has an non-existent morality, but he is still loyal to Kaedwen and Henselt and is an intriguing character.
Good thing Geralt didn't get into Saskia's pants. No need for him to plow everyone again that he meets. Besides, she prefer dwarves IIRC.
Having seen Dijkstra in the demo..

Could you believe these two had a tryst in the books? 
*shivers*
That was a picture I didn't need in my head.