Sorry, but a party that creates a national healthcare system, and embraces Socialists like Sanders and Warren is not centrist. You have absolutely no idea what conservatism is. When Liberals think about conservatives, they think Bush. That's wrong. Ron Paul's foreign policy was the policy of the Old Right. If you want to learn more about real conservatism, look into these people
Pat Buchanan
Robert A. Taft
Ron Paul
Paul Gottfried
Hamilton Fish III
Ronald Reagan
Those are conservatives. If you want to know what a real Conservative party platform looks like, look at this.
http://www.constitutionparty.com/our-principles/2012-2016-platform-and-resolutions/
If the GOP adopted this platform, they'd be a much stronger party. You can keep deluding yourself, but here's the deal. The GOP nominee will either be Trump or Cruz.