The question really is how out-of-character each character is acting, and how much you consider acceptable to tell the story. You have to expect they'll act a little different because it's a parody, but if they act nothing at all like their canon selves then that's a valid criticism.
I mean, it's a *NTR Game*. One of KiriSuna, even XD Just the mere fact of the idea ALREADY is making the characters completely and totally OOC, even before playing the actual game you can say that firmly without a doubt if you actually know the characters (And I say this as one of the rare SAO fans that isn't crazy about KiriSuna and prefers Kirito with the other girls more lol). 99% of NTR plots of already-existing-media actually already make the characters beyond OOC just for the mere idea of it, actually, so the truth is that it's if you really enjoy the porn without caring for the original plot, because they usually have to make the characters act either nothing like they actually are or get in situations they realistically would never even remotely get into (And usually make them extra-dumb/careless for it to even happen in the first place), and that's even getting into the other characters...Kirito and Asuna at least superficially acted a bit like their canon selves during the beginning of Part 1 at least when it came to their moments together, but nobody else has acted even remotely in-character at all since they first show up just so they could fit in Fujino's NTR-verse at all (The biggest example being Suguha originally being basically an angry tsundere during most of Part 1 towards Kirito, when post-SAO she's actually extremely shy and sweet/caring towards him lmao).
So yeah, the very basis of this game already shat all over SAO's source material, really, so like I said, it was pointless from the start for them to play it if they had no tolerance on something that respect the canon characters XP
Asuna: Inoda, my parents aren't at home

Inoda:
View attachment 4631950
I don't know which of these pics makes me laugh harder, so I'm just gonna give a congrats for the laughter to both ;P