This sounds less like a format problem and more of a developer problem. TiTs' main format of sex scene are static. But people dont get bored of it because there's always new stuff coming down the pipeline. While there's been a couple of new scenes that've been put out in LT over the course of... honestly i cant remember past the Nyan rework. I know that there's a lot of unique scenes in the game, but as for the sex scene system itself not much has been added, just slight tweaks to accommodate certain body types. But the dialog itself has been the same with no new additions or any new sex position (I think its time for Inno to buckled down and read the Kama Sutra). Now, this is the part where we say "Inno should get some help" with some of this writing but that's a horse that's gasping for air after getting kicked for so long, its not dead yet though.The problem with your examples is that most of them have already been formally cut from the game, and the rest are incredibly samey between each other. Like, I seriously can't think of any new variation in slave content having been added in ages.
Like, yes, they might be different activities, but there hasn't been much depth added between those activities. After like two years of minimal fresh, quality content, that stuff has all gotten super stale as well. There's only so many variations of the same stuff you can do with the same in game descriptions and dialog, even if they are *technically* different. This is the downside of the dynamic sex system, if variation isn't added then even if the activity is "different", all the dialog is the exact same. And if you've already seen that dialog 2000 times, then it makes the new activity feel the same as the previous 2000 iterations of the same thing.
And honestly, my favorite, well written smut scenes tend to be enjoyable longer. The problem is that its a lot harder to find that content.
Edit: I'm starting to think I'm talking myself out of liking this sex system. It seems to work best when the main fun or game play loop is the non-sex content.
As for "cut" content. The examples I listed are all still in the game, just no more support from Inno. Dropped support is not cut content, cut content implies its been removed from the game. With some of the new mod framework for scene being done im putting faith in modders hands to expand companion content since the elemental is only good for being battle bot and nothing else.