I share your hope and am in substantial agreement with the thrust of your well stated point.
Moving to the center is bad advice. Holding to conservative principles, without hypocrisy or deceit is, in my opinion, the way to go.
We remain, however, adversaries on the mechanism of politics. I do not believe that any political compromise, which seeks to move the playing field to the right, can accomplish that aim by even incremental movement to the left, even temporarily. A move to the left, requires even more energy to get back to the right, frequently more than is available, even with charismatic leadership.
Supporting a traditional liberal like Schwarzenegger, to stave off even more extreme liberal gain is, in my opinion, a bad decision which will bear immediately regrettable consequences. It is very difficult to undue the implications of the tacit approval of liberalism provided by an expedient compromise.
Lack of compromise is generally perceived as intolerance. Intolerance is a negative and costs votes from the middle. The appearance of compromise and the skill of negotiation can win the middle.