I think you've mistaken the Judicial branch for the Legislative branch ...
You think conservatives won't take the chance to initiate legal challenges against everything they hate? They've been doing it for some time. Kennedy was the swing vote on many issues. Now we don't have that swing vote, and there's theoretically no limit to the things conservatives won't try to mount challenges against, and if they do, they could take it to the Supreme Court, where they'll now have a guaranteed victory. And any challenges to things that benefit Republicans (like partisan gerrymandering, something that's almost exclusively by them these days) won't stand a prayer.