Aside from being an immature brat, does it seem like Sora is a little overly intelligent for a fourth grader? In some scenes he talks about how "we (the players) use each other for information?" and discusses using Silver Knight "as a pawn" and basically a bunch of other things you wouldn't expect someone his age to say.
He's just Genre Savvy to all the nuances of a fantasy MMORPG. He probably doesn't fully get everything he says, but he's heard others talk like that and has a working understanding of what they mean.
Does this show have any fight scenes at all? And if so, in which episodes?
I don't remember exactly which episodes these are in, but:
The first time Tsukasa sees the Guardian is when it stops the Silver Knight in the middle of said Knight attacking Tsukasa with a sword. The Guardian doesn't appear until Tsukasa is effectively cornered.
There's also when the adventuring party of girls attacks Tsukasa on a castle wall when the rumours about the Guardian are beginning to spread. That's more of a Curb-Stomp Battle than anything else, but that's kind of the Guardian's MO.
If I remember correctly, there's also the battle where Tsukasa is taken prisoner, and at least one other case where Crim takes part in a fight (aside from the offscreen one with Sora).
Not that I see why it matters, but there are a few towards the end. Crim and Sora have a final duel, and there is one or two big group battles with a Guardian.
There are also some "minor" fight scenes, such as Mimiru taking on a lizardman early on as well as Mimiru and A20 taking on a dungeon and partying (while missing Tsukasa). The fight scenes aren't meant to be impressive, but there are some at about every other episode early on as well.