The most obvious possibility then, I think, is that she feels SCEA doesn't need the expedited discovery, because she's inclined to rule for them without it. If you recall, SCEA stated it thought it had enough substance to win the jurisdictional issue already, and she may agree. After all, if she thought she was now inclining toward denying Hotz's motion anyhow and make him stay in California, why bother with expedited discovery? If she thought it possible she'd decide the other way, though, that the case *doesn't* belong in her court after all, if that was really up in the air, I think she'd be more inclined to grant SCEA's motion.
One final possibility is that Hotz's filings have so convinced her that she made an error that she figures there is never going to be a need for any kind of discovery in California, since she's going to dismiss for reasons none of the subpoenas can alter. I think that is the least likely.
Again, though, this is all just guesswork on my part, and you can always be wrong when you are guessing. This makes logical sense to me. People aren't always logical, though, as you may have observed, and so we'll have to wait and see what happens at the hearing.