Score One for the First Amendment

The Supreme Court of the United States made another good decision in favor of the people, and the Constitution. The best decision they have made since the Heller decision. Heller as you may know, affirmed and upheld the individual right to keep and bear arms and struck down Washington D.C.'s illegal ban on handguns. Now in a 5-4 decision, the court struck down the McCain-Feingold ban on so-called "electioneering" communications. This decision means that corporations are people too and  have the right to participate in the political process as much as individual citizens do. Kudos to SCOTUS for this momentous decision. My question and what scares me is, like Heller, why was this a 5-4 decision and not a 6-3 or 7-2 or even unanimous? Seems to me we need to get more originalists on the court.