I wonder if they're turboing the anime so much because they're trying to get to GGO in 26 episodes.
Volume 1 isn't really that long, so let's assume they squeeze A Murder Case in the Area into 1 episode, and then 2 episodes of vol1 (floor 74 boss + ambush murder attempt), then Yui, then a couple more (duel + floor 75 boss), and SAO arc is done. That puts it at episode 10.

Fairy Dance, you could probably get away with about 8-10 episodes.
And that leaves 6-8 for GGO.

Apparently Sinon has a voice actress according to some sites, so maybe they will go for it. I really would have liked to see them expand on SAO more, though. First Day in particular is a pretty epic story. And cutting down Aria to the bare bones was sad.

I'm not sure whether I like Fairy Dance or GGO more. I think GGO probably has the more interesting story, and I like Sinon better than Sugu.

What do you guys think about Alicization so far? I didn't really like vol 9 much (cliffhanger at the end of Interlude is craaaazy though). You grow to like all of the characters and then they don't show up.