In my opinion, this one wasn't able to be on par with its predecessor. Albeit having the same concept, the series wasn't able to maintain its enjoyability.
To be honest, I had high hopes for this one. With my high regards to the first season, I was expecting something better. First episodes were actually good. The concept of GGO is nice: exploiting one's weakness while unconscious. It is indeed another risk of the VMMORPG system. Also, the battles were quite good.
But that's the only good thing I saw here. A total letdown, IMO.
The pacing is rather slow. The GGO end is rather anticlimatic. The events after GGO is rather boring. The side characters have no real relationship with the actual story (maybe it could've been less annoying if they had less appearances, or had side stories, idk really, but it's annoying).
Unlike the first season, rather than a series of stories within the world of GGO, it became a one loooooooong chit-chat and flashbacks.
On a side note, also presented in the show is the possibility of virtual reality in palliative care. But yeah, it seemed to lack enjoyment as well.
Overall, it really is a letdown.