I'd personally think Maki has enough talent and fame to not need to go to AV. Maybe I have a wrong image of things, but I tend to see girls who go into AV either as girls who really enjoy that type of things or girls looking for a lot of attention in a really wrong way.
I would think that if Maki enjoyed that type of thing she would've done it ages ago. She doesn't need AV to get attention. So if she did it now, to me it'd feel like, with all that's happened in her life, along the way she's lost all respect for herself and people took advantage of her state to lure her into it.
Yes, she's been much more racier than the average ex-H!P-member, and I wouldn't be surprised if she did more of those semi-nudes. But AV? That'd just be dropping her standards to the floor. I still see some class left in her, she still has some elegance even when doing the semi-nudes. But there's no class left in AV. Would be disappointed.