This one its really a mixed feeling and i will tell you what about Blacktantra and what you can use / expect from another creators... I am a fan of Blacktantra but the following items i will mention are for me turn down on his proyects and then i will put the "general" points for me in the other ones...
Backtantra PRO Points:
- He's innovative some times in different kind of styles of JOIs (Like headplay proyect, like the Marin Kitagawa fap to the countdown (this will be my first funscript release that im working on tbh) etc)
- Despite the AI voice he use in his proyects are "meh" this is a neat and unique style of releases wich no other creator (i think) use this kind of voices for his JOI's proyects...
Blacktantra CON Points:
- His Ai Artworks sometimes tend to be really clunky like i found in some images that the AI want to draw like a swimsuit and forgot to draw some parts of the swimsuit... Aside of that the uses of his last hostess (the Succubus Host or another hosts) sometimes the draws for my point of view are really poor or im not feel really turned on for what i saw and i think he need to polished that to develop much more erotic and great ambience in his works.
- The damn constant way of explain what a succubus do in each time the succubus host is in... the "did you know we succubus use magic to extract the seed of men? bla bla bla bla" this is really a thing that really get on my nerves each time i saw a work from him like... Dude if you are making a series of that explain it in the first part of the serie and then put more innovative talks or some other kind of dialogues for what is happen in the JOI. The recursive way to mention as slaves too.
- The "hihi" or "ahhwww" forced sounds of the Ai sometimes its kind of out of the blue too..
Other Creator CON Points: (The MOST ONES WHO USE VA Actress in his JOIs)
- Im super annoyed to listen each time that Bunnytatsumi girl in JoiGang or the other VA's that sound nearly as her (Right now in each video i hear that voice i hear a girl whose like a "wh*re" in real life, like she do what she do but without a centimeter of commitment to what she's doing and i know that 99% of the mens are really turned on for her voice for me never reached me really well). I really want to start hearing different kind of voices from different kind of girls that not sound like a wh*re for characters that are remotly similar to one and not im not saying that VA need to force the voice to sound more childish / tomboyish because that make the things worse.
- The exesive use of "Mommy this Mommy That", "Sweety this Sweety that". This is most a personal opinion for me, im not telling that its not great to listen from time to time but some creators all of his titles / contents are around that.
- The lack to do some "innovative" kind of content like what some creators i saw (sometime Blacktantra does) all the time now its "the roulette", "the gangbang with the number" its like its getting boring (because you cheat the end of the video know wich number is the one who wins and then done) and with some really "low effort" things you can build a great mood without those kind of things... I don't remember know wich creator do like a series of Akeno from Highschool DxD where she cheats Rias with the MC but those where some contents that were great to go (its not mandatory to have some cheating in the plot but sometime are good vainilla ones to see).
For me this is what i think about what you mentions about Blacktantra compared to what "most creators" do right now in the scene...
And for me if you don't saw it let me recomend you a "Free" video of Wutfaced called:
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(And yeah its Azur Lane but like i told you i like Azur Lane sorry for that in advance)
Part 2 was great too but Part 3 i think he could do it way more better but the Part 1 for me is one of the Top Tier Joi's i found on the page, that one builds momentum, the script of the video is great (i think he has some grammar errors) the images are great too and i like the "beat sounds" he use.