The thing i think people didin't like was the fake Kirito scene as trigger, if you think about it that was unnecessary, the way Inoda manipulate her about her putting to much pressure in Kirito and his performance issues was enough.it's like how people don't like the reason for Asuna finally "falling" in the most recent update. Some might say it's cliche, or call her a hypocrite. But it's at least believable enough within NTR/Hentai logic why she's nuts, considering you go in with the general assumption that the NTR heroine has a number of screws loose to be capable of being corrupted to begin with.
It's like Asuna was given by Kirito a reason/excuse to cheat, shifting the blame more or less, if Fujino had left the fake kirito out the fall would be more authentic, she woukd have choose by herself.