excellent episode....
although I really want them to stick on 'saving-Asuna' mission, this kind of twist is kinda necessary because it holds a strong connection about how to reach the tower..
I guess, Kirito will be the center of big alliance between those three races... then because of his strong ambition to reach the tree, they will assist him...
I do remember Lyfa mentioned about how all of races need to work together in order to reach the tree.
If Kirito can hold this matter, Sylph, Cait Sith, Salamander, and Spriggan (Kirito) already on his side... (maybe just need some revelation about what he has done in Sword Art Online)
ah! that Gleam Eyes is awesome... that's what you got from messing around with hero, Kirito-kun