And it wad a very good scene, but it didn’t give that moment of "ending" between the two that needed to happen. Especially when the next we see him he's once again blowing off Sinon to go see Sugu.
For me, this honestly felt very karmic and a funny way to end him, honestly: Suguha WAS the most relevant girl plot-wise, but Sinon WAS the one he had screwed over way more by then canonically when it came to ruining their lives (Nevermind the other unnamed 98 girls he had fucked around before them) and one of the key points near the end of his relevance was how Suguha literally gave no shits about him, even as a sexual outlet she had just plain out stopped really getting off with him unless she was pretending he was her brother and she didn't care anymore what happened to him anymore now that he no longer had control over her nor did she need him for anything anymore. Hell, it unironically painted Suguha as more mature than Sinon, the former no longer gave a shit, the latter wasted who knows how many resources and how much money from the council's just to turn him into a girl out of revenge, Suguha only joined in screwing him over AFTER Sinon had already transformed him but mainly did so because it was part of the agreement for Shino to give her help XP
Yeah, anyone paying attention knows this is a cornerstone of what makes her current personality. It was caused by her time with Suguo as Titania and Oberon, which we have seen is where he probably raped her in game until that version of SAO was ended by her father. Sugou actually went to jail for some of the things he did (though it's never specified what or why), and only just got released (it was a few updates back, we spy on him in the club with Sinon, I think).
To be 100% fair, this was just an out of nowhere shitty excuse written for Fujino that even further diverges for Canon so there was another 'excuse' for Asuna's OOC behavior from the beginning rather than her just being affected by NTR logic, and even if it made sense, on top of her memories being basically repressed, Sugou/Oberon never really managed to fuck her before being stopped as far as Fujino himself confirmed (He really should just stop trying to retroactively justify stuff because it only creates more plot-holes than just handwaving them away, tbh, like how he suddenly felt the need of excusing why Silica wasn't appearing in the game and it just made an even bigger plot hole of why Kirito wouldn't have bothered contacting her or being worried about one of his few true friends from SAO lol).