Yea, I think people are tunnel visioning on the ending of Part 1, thinking Fujino has to or will end Part 2 the same way; with sex between Asuna and Inoda that changes the status quo of their relationship in a major way. But Part 2 could end differently from what most seem to think will happen. But as long as it has an engaging and not shoehorned cliffhanger, no one should reasonably be upset if it doesn't end with a sex scene.
I personally am in the camp of having it end with IRL sex, but I wouldn't feel distraught if it ended differently. To me, it seems like that's what we've been building up to—ending Part 2 with Asuna and Inoda having consensual IRL sex. Throughout Part 2, Inoda has been breaking down Asuna's morals and making her more debauched to eventually have IRL sex that isn't mostly forced (like at the end of Part 1) by making her justify cheating using FOG cause "it's not real", realizing Kirito isn't sexually satisfying her as he has, using the people closest to her to further separate her from Kirito, and manipulating her into thinking that Kirito is willingly cheating on her.