I agree with all of that except the new arc in SAO II has nothing to do with the 2nd part of SAO season 1. I mean if you hate Kirito then fine don't watch it but his shit sister and Asuna are hardly in the LN during this arc. The arc mainly is flashbacks to things that happened in the first half of SAO I that they never animated but have relations to new shit thats happening in this new game, and of the new game that Kirito is investigating for the govt. cause hes a Gary Stu who can do shit that govts with unlimited power and money can't do cause its anime and yeah. All I am saying is I don't defend SAO and Log Horizon is Far FAR and away better anime but this new season has hardly any relation to ALO and while not to the same extent, is the same as people I know who won't watch Girls und panzer because they equate it to the utter shit that is strike witches without even trying it out. Or the people who refuse to watch Phantom Requiem for the Phantom because it's Bee Train and everything Bee Train has produced since Noir was utter shit. The thing is, Phantom turned out to be the best show Bee Train has ever produced but no one watched it cuz of all the shit they did after Noir (I am in total agreement that everything else Bee Train did was terrible, it really was, the only good thing they brought to us was was Ali Project). So anyways, basically because of past experiences I don't autojudge shows based on past seasons but I always will watch the first episode before tossing it. I guess the closest comparison to a season 1 and season 2 of SAO would be the differences between different series set in the UC timeline of Gundam. A lot of the series shared characters but they were stand alone otherwise and each series was different. Because the arcs in the SAO novels are the same way, I am not going to prejudge SAO II based on the 2nd half of season one until I see a little of it. If they start doing the same shit they did in part two which they don't do in the LN so it would be anime original, then yeah, fuck it, i won't watch it either. But if they don't then, eh, it should be decent.
EDIT: Yeah I kinda re-read exactly what was being asked and originally thought the person was asking about S2, but now I know what was being asked, yeah don't watch SAO at all, The other stuff you listed is far better and theres other stuff you haven't listed that you should watch first as well. My comments were more about not watching SAO II cuz of the 2nd half of SAO 1 if you watched all of SAO I.