Two more thoughts about the paucity of holdings in Judge Chin’s opinion:
First, the structure of the opinion makes appeal more unpleasant. Chin didn’t put all his cards on the table. If the parties appeal his denial and win, one plausible outcome is that the case gets remanded back to him to try again — but he’s signaled that he’s likely to deny it again. That’s a long and protected litigation process, which can’t be encouraging to parties considering going the appeal route.
Second, by refusing to make new law on any issue except for Rule 23, he limited the uses to which his decision can be put as precedent. The antitrust section will be a gift to Google’s enemies in the court of public opinion, but probably not in a court of law. He thus avoids creating an immediate basis for me-too antitrust lawsuits. Similarly, the international-law section takes foreign concerns very seriously, but imagine a world in which Judge Chin is reversed on appeal, or some other court approves a similar settlement. Anything Judge Chin says could be cited against the U.S. in a WTO arbitration or some other international forum. By limit what he says, he also limits the potential headaches for U.S. diplomats and government lawyers.