"Mild BDSM" and "spanking" feels like a gargantuan overstatement. The Elf Queen/Princess/Succubus girl that rides the protaganist as he sits down while his female companions stand nearby? The Protag talking a bit dirty to L'ightning and giving her butt a gentle love-tap? The images and the story are extremely high-quality but they all bend over the same way, or spread their legs the same way, just with small differences.
Meanwhile, I'm betting most of us have seen women getting impaled by tentacles the size of telephone poles. I'm not suggesting you include that, but after all that, watching this game's sex scenes does make it feel like I'm a peeping tom in Iran.
How about some
real variation. Have a girl with her legs tied down and spread wide or ass in the air, suspended and helpless, ballgags, magical instruments that "zap", light sexual torture, "rape" with (or without) an aphrodisiac (doesn't need to be the protag if you want to keep him pure)... something.
Anything. And yeah, the protag doesn't need all the sex scenes. Have the antag(s) capture someone and "torture" them for information - nothing extreme. A lot of women will do anything to get a vibrator away from their clit after they come.
Spice it up, bro. Use that big creative brain of yours that's concocting this incredible story to come up with something other than "this girl lifts her leg", and "this girl kneels on the floor"
In any case, I've fallen for your games ever since I played
Friendship With Benefits. Keep on being awesome