Jiggling : it's a question of animation, yes.
But if you noticed, I often come back on previous poses to improve them a little, which includes, sometimes, adding some boob jiggling.
Try to check every pose, in a freeplay mode, and tell me if some of them have the kind of jiggling you like. (that could help me knowing where I'm going on that subject)

For big ass : it's interesting how the country of origin seems to have an impact on women representation.
As for the "skeletic" debate or "lolicon" debate, this could be a "ass" debate : I represent women the way they "globally ARE, and generally considered cute" in my country (all taste and fetish aside, I mean), but depending on the nationality of players, they feel like playing with little boys, underage girls or anorexic women.
I must say I'm kind of amused by that, as I'm usually interested in doing non-classic/non-canonic stuff.
Doing "classic girls" of my country seems to disturb common hentai web players… kind of fun

But whatever : will try to add big asses, yes, noted.

• Jiggle. If you have big tits, you should have some options for big asses and hips as well. (Otherwise, the girls sometimes look like small boys with tits.) And a bit of jiggle on their bounces would be nice. Admittedly, though, that's a lot of animation to deal with.

• The female futa/strap-on should have a dick that matches her skin color (it doesn't all quite work right now) and options for darker skin colors.

For you suggestion : you should give me directly your list of names, it would be easier for me to put them directly in the game, instead of programming an interface to do it

For tentacle stuff, you know my opinion on that
Always lovely, but there's already hundreds of games on that that do it better than me !
(shinobi girl, what-its-name japanese game just like it, swiss-made games, etc…)
I already struggle to give an honorable amount of contents on what my game actually gives, so let's aim lower for now

For people dropping off of the web, yeah, working on a same kind of stuff IRL, I bet on this kind of results, alas.
Very few creators (given the "worldwide" context. 6 billions people on earth, and only 2 or 3 new hentai games a week ? Gosh !), very few good websites, and trolling and harsh critics everywhere in 75% of comments, requiring ten times what's already hardly done with lots of sweat and pain.
It's kind of logical every creators gets demoralised and demotivated to do anything, given the kind of reception they get (remember "holio-u" games' comments everywhere, lol !).
But the more give up, the more users get frustrated and jump upon who's left with more requests and impatience, and the faster they discouraged those who already struggle so much to do so few.
It can't ends well

My bet is we will have a desert era, where people will go to something else and learn the hard way how to do "without".
After that, new creators will rise, as hentai and creativity is a mankind constant
But this time people will support and motivate them, and don't ask or wait for anything in return, given their previous experiences and new habits of lowered expectations.
And let's hope this time users will wait for the number and quality of creations to rise before rising their own expectations.
We'll see

But you intrigue me : you say you work in a more fetish-only side of the net : how come ? Can you share a glimpse of this side ?

(anyway, thx for the support ! Given I'm a freaking boring and sloooooowwww creator, it must be hard, lol !)

And a sideline problem is : will the next release be big or not ? If I do the earliest release possible, you will just have some bug fixed and one or two new poses, tops.
Not sure fans will be pleased with that at all !
So… it's a very complicated problem, lol