I do see where you're coming from on this. I'm certainly not going to spoil the events of the light novel, but I will say that Kirito's personality theoretically shouldnt be a problem for at least a season.
I've only read fron volume 9 to 15 though, so anything past that is beyond me. I think for the first time, our central villain is actually compelling and understandable. I also see the general concept for the season interesting, focusing on ideas about AI. Reki still gives in to a few bad habits he has as a writer, but I'm hopeful at least.
Anyway, I still haven't watch the GGO spinoff yet. But maybe I'll give it a shot if you're saying it's worth something.