They would never turn anyone heel based off the reactions of only one crowd, especially the post-WM crowd since it's considered an anomaly compared to your average WWE crowd anyway. There's been rumors of them turning heel for awhile now. Keep in mind that the original idea for The New Day gimmick was rumored to be something closer along the lines of the Nation of Domination than a bunch of stereotypical black congregation members (or whatever the fuck they're supposed to be.)
Also, Batista wasn't turned heel only because of the reaction from the Rumble crowd, otherwise they wouldn't have kept him as a babyface for several weeks afterwards. It was because pretty much every town they went to kept shitting on him in favor of Daniel Bryan and it eventually reached such a fever-pitch that the Bryan marks were literally hijacking the show. Hell, he even got a mediocre reaction on the night of his return. If the only negative crowd reception that Batista had ever gotten was from the Rumble crowd in Pittsburgh, you can bet that Batista/Orton would have still headlined WMXXX as originally planned.