Actually the best season of SAO as of now. Why? Let me tell you why:
Seeing Kirito as a soggy slowly rotting sack of potatoes. 10/10
Turning down the exhausting harem complex of the series with just the right amount of "Kirito don't you dare to fucking die (sort of)" between the female characters.
Extremely fun to watch action scenes on a massive, Lord of the Rings or Narnia like scale. Animation and Sound are on point. The focus truly lies on action and visually and sound wise impactful scenes which is the main reason this season is actually quite good.
Even though it ain't much but its honest work: A little bit of backstory for the side characters that take up most of the actual battle time of this season which is great seeing other characters turn up the heat other than Kirito.
A somewhat good twist in the story line which is minor but cohesively connected to the characters backstory and development. A rare occurrence in SAO but surely a welcome one. That is when the monster factions characters slowly realize that they are being exploited and turn their differences aside to fight together with the human faction.
