I get what you are saying one game I play took 14 updates just to get a kiss while I dont mind as with the context of the story the extreme slow burn makes sense to me. Just like it does with this one so far. But I also agree a well balanced game is much better than one that goes for realism or extreme slow burn . Because of deveolopment time for how long these games take in general it's a bit unrealistic to do really slow games unless a dev wants to spend years without progression. If dev time was alot faster for AVN's in general I dont think an extreme slow burn would be an issue.
I've yet to play the update but I do think this game might start to speed up some. As I do think it's at a point where the game needs to decide does it speed up and allow her to actually get a bit corrupted or go for extreme slow burn. Cause while I do think how slow Lilly has been makes sense because of her character. After the end of Chapter 6 I think it will start to make a little less sense for her not to speed up some in certain situations . As I just do not see a story reason for her to stay at her current speed anymore as she has done a few lewd acts now if you have gone for full slut points. If she is willing to stay passive and not show any backbone unlike earlier but gave give in and give that guy a handjob that is disgusting ( I forget his name). I don't see any reason for her character to stay so reserved as it will start to slowly feel out of character I think if one moment she is reserved about doing lewd acts and not the next unless she just does not like someone and she doesn't need to please them for whatever reason. But I do think we are also at a point giving us the option to go as far as maybe a BJ would be very welcomed in certain situations.
My ultimate concern for any slow-burn is the MC getting caught in the repetitive cycle of questioning why they enjoy a naughty act, and their feelings of conflict. As you said, after awhile there's no longer a reason to keep progress slow that fits with the game's story. And yet there have been too many games that get into a cycle of "MC does sexy thing" ---> "MC enjoys sexy thing" ---> "MC resents that they enjoyed sexy thing" ---> "MC swears they wont' do sexy thing again."
For any of these games with impossibly naive MC's, I feel as if they all struggle to make the jump to Act II. Many of them do a great job of establishing the character's innocence, but then they can't execute the payoff and make the transition to a corrupted individual. Eventually they get bogged down with increasingly intricate events that fall into the trap of over-explaining everything. Things need to be setup well in advance, and then need to occur multiple times so that the MC feels comfortable in the situation. Like you said, because these games take a long time to produce, this means that real progress is painfully slow.
I have to admit that I have a bias in all of this. As a woman it makes my eyes roll how we're portrayed sometimes. Look, I get it, today isn't my first day on the internet; and we're all here for the same thing. But it does get frustrating how the women in these games are either mindless sex machines, or they're so impossibly naive and sheltered that they can't even think the word "penis" without having inner monologue about how uncomfortable that makes them. Neither example is inherently bad, sometimes you need characters that are just mindless sex machines or are impossible naive, but I find the latter far more frustrating because it overly complicates the experience. You can be naive without also being an idiot or darn near asexual.
I'll say this: I think 2025 is going to be make-or break for this game. If we get another 6 updates in 2025 and there's still little/no explicit material then I don't think we'll ever get it.