I didn't include Eva due to her personality. She's too "mean girl" and I'm not sure she'd ever change into someone I'd like. Her looks are great even though she could use some meat on her bones.
Auya is 50/50 for me. Ocean kinda ruined her with the grandma hair. She looks good in some renders and quite meh in others. Also I'm waiting to see what it means for her to be a "special case". Could be something that really puts me off of considering her an LI.
Nojiko is a smokeshow! The only "milf" I find attractive here. She's a 10/10 for me. However I don't think that kind of relationship with the MC fits at all in this story. But Ocean is free to give me all the renders of her, I won't complain. Maybe a little sidestory of a random spicy encounter with a stranger before she met Nick? A guy can dream...
Overall I like your suggestions.