Never seeing Illya, Yuuki, nor Silica in his games was certainly a disappointment for myself too, so I get you, though apparently that may have been to avoid loli-related issues with Patreon maybe. Which is sad, like, I get the 'reason', but it's not like countless artists or content creators, even shitty AI-ones, don't keep making loli content and get away with it just by saying all the characters are old enough. Funnily enough, despite being treated not only here but in a lot of content as way older or like she was closer to Kirito/Asuna's age, I wonder how many remember Shino/Sinon is actually younger than Suguha, she's literally closer in age to Silica actually, and very flat, Fujino "boosted" her tits a lot until she seemed around Asuna's size (Which is why Taiga probably wouldn't have been an issue either if he wanted to implement her) so I see no reason why he couldn't have done that too with the 'lolis' XD (Though then again given the issues and bitching that arose from most of his followers in this game from 'too much filler' being thrown at anything that wasn't Inoda corrupting Asuna all the time, it's probably for the better that he didn't add more characters, especially when just adding Alice made him create an entirely new and mostly unrelated/pointless plot to Part. Ironically, though, if it had been Silica instead of Alice that could have been prevented, as she probably would have been quite easy to add to the 'main plot', maybe even more easily than Liz).