You make some good points; however, I think if several "big name" Republicans left it might be harder to ignore.
All too often we elect conservatives who then abandon us once they are in power.
I think the problem is that we elect people who RAN as conservatives, but we never spent enough time figuring out if they were really committed to conservative principles.
Finally, on the issue of abortion (the slaughter of innocent life) we need to keep pushing, but change our tactics. IOW, appeal to the concern over the safety of the mother. Abortion clinics should be better regulated, only doctors allowed to perform them, their business structure should be transparent and who their lobbyists are should be publicized.
I am unwilling to support policies that essentially say, "do this and THEN you can kill babies."
The reality is most Americans are totally unaware that 50 million babies have been killed since 1973 and that babies continue to be slaughtered at the rate of 150 per hour. If a candidate gets in front of the American people and simply lays out the FACTS about abortion, I think we would see a dramatic shift in public opinion.
I don't want to do that either, but now that we've lost the opportunity to change the SCOTUS, and Congress won't send an amendment to the states, the best we can do is fight a holding action and appeal to the emotionalism of the mushy moderates. IOW, push safety issues as a means to making it harder to get an abortion and much more expensive for abortionists to be in business. Also, we should be pushing to protect hospitals and doctors from being forced to perform abortions.