The three Tor watering hole operations (Freedom Hosting, Torpedo and Playpen) are the only cases we know of where DOJ has obtained a warrant from a single judge which it then used to conduct searches on hundreds or thousands of computers. DOJ did not seek new powers to conduct bulk searches/hacks from Congress, they just went ahead and got an ex-parte warrant from a judge. In the case of Freedom Hosting, it looks like they also screwed up and then hacked the computers of innocent people visiting other, non contraband sites, hosted on the same server.
I think that reasonable people can disagree about whether or not it makes sense to allow a judge to sign a warrant to hack a single computer in an unknown location which is probably outside of his or her district. Bulk hacks are very, very different, and a very new thing for our legal system.