So some other things I would love for Fujino to add:
Typical comparison sex, which looks like is already added from the previews he sent out a while back. When Asuna has sex with Kirito, she compares him to Inoda and feels very unsatisfied, and she has to masturbate to get off and thinks of Inoda, craving sex with him again.
Asuna getting jealous. Maybe add an angle where she desperately tries to cut things off with Inoda and is successful. However, Inoda seems to get lucky in finding a girl and Asuna starts to get slightly irked. Then maybe Asuna & Kirito go to a hotspring or hotel or something, but Inoda is also there with his girlfriend. Asuna tries to get intimate with Kirito but Kirito is too tired, so they sleep. Asuna is woken up by moans/sex next door from Inoda, and she gets insanely horny and masturbates to the sound of them having sex. Which leads to Asuna having to reach out to Inoda to continue more of their past sexual escapades together, but on her request.
Asuna slowly getting more lewd, but still having the aura of a woman thats hard to get and still uptight. She only really responds to Inoda. More public sex, humiliation, etc.