Not in my book. Besides her background in Alaska (which is not as stellar as is sold here), when she quit her job to become a national player, that was the first strike. When she backed RINOS like Carly Fiorina, Juan McCain, Orrin Hatch, Pam Bondi, and Karen Handel, that was the second strike. When she decided to grandstand for a living instead of studying historic, regulatory, and economic background information to qualify for that office (as Reagan did), that was it for me. It demonstrated that she had no intent to do the homework to be truly qualified to be CIC.
I can tell you that since 2008 she DID put in efforts to become more informed and engaged on many of the key issues of the day, and had a staff that worked to keep her informed and able to speak on some of the big issues of the day, and some of the complexities associated with them.
I too share your frustration with some of her endorsements (as you said John McCain and Orrin Hatch especially), but it's not fair to not also cite the dozens of other GREAT endorsements she made and the impact she had in helping anti-establishment candidates overcome their establishment opponents.
I understand we disagree on the larger point of whether she is well-suited for the White House (I believe she is and you believe she is not), however, she has a better track record of experience and a better perspective and understanding on the fundamentals of how/why this nation was founded and the thinking of our Founding Fathers than the current president - there's no comparison.