You know a scenario that would be funny?
If the game begins on the 75th floor with the Heathcliff duel, perhaps the way Kirito wins is to fight him using no sword skills. (with the game telling you that) If you did use a sword skill, sword breaks, Asuna+Kirito+Heathcliff dies, game clear!
People that don't know the plot would be like, "WTF? This game is too short!"