I think instead of overall rankings, it would be more informative for law schools to have rankings for the specific things people actually care about. So things like: prospects for getting a Big Law job, getting a federal law clerkship, doing public interest work, etc.

Sure, people will always care about overall ranking for the prestige (though I expect overall rankings to correlate highly with big law job odds/overall compensation) but at least if it's split up into these very specific sub-criteria, then people can't quite game the rankings in a dishonest way.