1. I merely went to a previous save & then chose to spare Gert. The GTS blowie was better than Nat's.
2. Selina is a lesbian.

Mia might be a bot.

All the others? You can't bang them all. Heck, I wanted to bang the BBW at the mansion & nail Mindhunter.
Life goes on. The MC got enough action. Dia, Haura, rich bitch, the professor, AI & the superchicks were fine.
3. Frost was the worst of the lot. She was too dangerous to spare.

Knowledge? She was still useful. Like Memoir...
4. The grind is worth it for one hit, one kill take downs.
5. Agreed, the gigantomastia level tits & Mega Asses are Out Of This World. The animations are pretty spiffy. I didn't mind the mini games & subsequent planning required for the end game content. Hell, I earned my Happy Ending(s)!