Interesting analysis. My first “exposure” to the Leisure Suit Larry franchise was around 1989, when I was a sophomore in college, still living as a woman as that was long before my gender transition. A male friend had LSL3 on his PS/2, and a group of us — all the others men — got together in his dorm room to play it over many sessions (it came on several floppies that constantly had to be switched). I enjoyed working together to solve the puzzles, and didn’t care much about the sexual or romantic themes.
Some time later I acquired LSL1 which I though was rather disappointing in comparison, and many years later I acquired the rest of the series, none of which interested me much; I didn’t even remember most of the scenes you described in LSL4 through 6. But I did have fond enough memories of the series to contribute to the Kickstarter for the reboot a few years ago. I remember reading about some drama happening with the developers soon after that shipped, so I’m not surprised to hear that Al Lowe won’t be involved with the next installment.