The game is progressing, just not the way you and most people want.
Tao was added long ago as you say, as a "hollow" character and now both the last and the next update continue his storyline while also adding a new zone with two new enemies. That is progression. For you these two updates will be trash, but for the people that actually like the character they will be delighted to see their boy finally getting some deserved love. Let people have their fun sometimes, and if not having the content you want really annoys you, you can simply support Hyao in Patreon and tell him directly in his Discord. Complaing here constantly wont change anything and nobody want to hear people cry every time new content they don't like is posted. Saying that you don't like something in a constructive way is fine, being a constant whining brat is not.
The biggest problem Lustful Desires has it's that no matter what they add or do, people will always complain. Lizards get an update? People will complain that Northcrest didn't get any. Northcrest gets content? People will complain that the werewolves were forgotten. Werewolves got some love? How dare they not giving it to Nameless. And so on.
Let's not forget that every single character in the game right now was once a hollow character with barely any content to their name. Compare Ste how he was before, appearing once in the dungeon and never seen again, to how is the character now. Xeroth didn't even have a dialogue tree. The now everyone's favourite Nameless was just a voice with a few lines of dialogue when he first appeared, very long before we know he was a big beef DILF.
Could Hyao focus a bit more in existing characters? Yes. Is it bad to add more characters with potential to expand in the future? No.
It's true that lately updates have been a bit "lacking" compared with old ones, I do agree. Old updates were packing with content and nowadays the patch notes are just a quick read, but that is a topic for another time.
You are very aggressive to label us as "whining brat" by
twisting our words, and then you just repeat what we complained about....Nice try

. So you think we say it is "whining", but comes from your mouth it somehow becomes "constructive"?
Not a single time I complained "the update don't have the contents I want", I was commenting on the updates that didn't have contents.
And ofc you will conveniently not know, I praised these two past updates in my comments as they have substantial contents. Surprise, I actually enjoying most contents they add in - when there are contents. And no, 2 NSFW Pictures are not "substantial contents".
But that's like 2 out of 12 months. How convenient you use them as proof for "The game is progressing".
The biggest problem Lustful Desires has it's that no matter what they add or do, people will always complain. Lizards get an update? People will complain that Northcrest didn't get any. Northcrest gets content? People will complain that the werewolves were forgotten. Werewolves got some love? How dare they not giving it to Nameless. And so on.
If Hyao stick to one area to (at least) near finish, then move onto the next, no one will complain about Lizards, Northcrest, werewolves, rats, Orcs, Nameless, etc.
But instead, He dug so many holes without filling any, so that leaves everyone hanging without any closure. OFC everyone will complain. That's the problem he created himself.
Tao was added long ago as you say, as a "hollow" character and now both the last and the next update continue his storyline while also adding a new zone with two new enemies. That is progression. For you these two updates will be trash, but for the people that actually like the character they will be delighted to see their boy finally getting some deserved love.
And Why Tao Lovers
need to wait for so long to Finally have the chance to have their fun?
Could Hyao focus a bit more in existing characters? Yes. Is it bad to add more characters with potential to expand in the future? No.
And how long Hyao plan to spend on developing this game? 20 more years? Because none of existing (meaningless) additions has any substantial development to them. Your "For the Future" talk is just as hollow.
Anyway, it's no point to argue with you,
I'm just bored as there's only "a quick read" in the patch notes.