Yeah, I also had a feeling the antennas were involved, but I didn't see anything exactly to confirm it. Nor can I think of why they'd do it, unless Adminstrator can feed/work with Kirito's energies IRL. I think she'd made the point of saying how brains and fluctlights are very similar.
Maybe the antennas are a sort of tie in to the OS movie, part of the broadcast network technology that lets them do the Augmented Reality game. Although even that required a headset device, so Kirito seeing Asada naked couldn't be a part of that. He's just losing his mind.
IIRC he entered Alicization after the poisoning, which I guess could still happen but would feel very out of the blue now. Alicization probably can't/won't happen in the same way it did, but I can see Kirito's general and mental health declining and him needing to be logged into a VRMMO until cured as a way to tie the canon and Fujinoverse together. As you say, it will give Suguha plenty of time to 'take care' of her oni-chan IRL, maybe while Asuna, Inoda and the gang get to visit him in game.
I'm reminded of certain artwork where Kirito wakes up from SAO to find a pregnant Sugu taking care of him.
It's pretty obvious that Prurience is the differentiator. Most people probably have been taking the Prurience options to see extra/lewd content, but it's clearly becoming part of Kirito's persona now, if you've kept taking the options. Case in point; the way he looks at Sugu, his consideration of sexing Alice for Klein, and the church 'speial service'.
I imagine the story will feel different if you don't take any of the Prurience options; you just get flat, non-lewd Kirito while Asuna is still stolen away. Prurience Kirito almost certainly leads to Cuck/Harem Kirito, who may one day accept watching Asuna and Inoda while himself indulging with Sugu/Asada.