It's somewhat disjointed with several parallel story lines, some of which are less interesting than others. There is seriously an episode that is basically about one character ranting... here is a summary:
It is also less well drawn and animated than season 1.
But season 2 also
...explains several of the mechanisms behind the world of Log Horizon and how things work, including the gold system and the rebirth scheme.
...gives us a closer introduction to Plant Hywaden - the other powerful guild led by an adventurer with skills similar to Shiroe's and in charge of an empire that uses cyberpunk'ish tech which they plan on using for a large scale war.
...shows us how some people are settling in and building new lives in the game world while others are beginning to crack and lose their minds over being trapped.
... introduces us to Roe 2 and we get an explanation for why this virtual world exists and who built it.
... provides serious character development for several key cast members.
... a lot of other interesting stuff that expands the LH universe in general.
Therefore you should watch it, if you are interested in the title. While it is true that the second season is less focused than the first and obviously made on a slimmer budget, it is definitely not filler. Both the world and the characters are developed further, and we even get a new (and pretty awesome) addition to the main cast.
If a season 3 is ever made - and there is a chance since the novels are still on-going - it will start from the end of season 2.
Well, Overlord does hint at a very large world with other players that could prove a challenge to the MC, but the season was way too short for the show to explore in the same way that SAO does. Also Overlord ignores "the real world" completely.
On the plus side, people definitely die in spectacular fashion when they are killed... it has a leg up on SAO here...
You fail to see the big picture her @AppleJinx .
Imagine if we get full immersion VR systems like the one depicted in SAO. Would gaming be the first and foremost application you'd think of? Is entertaining bored teenagers with too much time on their hands the only way to use this tech?
SAO is one of the few shows to ask this question and deal with it seriously. Demonstrate how VR tech could be used to give seriously ill or disabled people a new quality of life by creating a virtual world where they can exist away from their limitations and pain.
In Log Horizon we are told that one of the cast is disabled in real life and in Angel Beats the story with the most feels involves a bedridden girl... and we've seen it in Ghost in the Shell of course. But SAO does it better than any of them.
No, it's pretty accurate.
But it's like being shown a juicy steak, but then served a lukewarm hamburger. Is it any wonder that I get frustrated after a while?
Log Horizon keep lining up story ideas with great potential, but then turning 90 degrees just when you think you are about to get the payoff.
SAO is not perfect - and the ending of Aincrad is flawed for sure.
Technically they do have an explanation of sorts for Kirito's ability to revive after been killed though. Earlier in the arc he fights Santa Claus for a "revival item" that is able to bring people back to life up to ten seconds after they have been killed. Hence we know that there is a delay between being killed in-game and death in real life. If he is able to influence the system to respawn him before the nerve gear roasts his nugget, it makes sense that he doesn't die when he is killed... sort of...
As far as Klein and Agil dying is concerned, they weren't immune. Some of his friends did kick the bucket...