Well I am an RP supporter so I figger I can take a shot at addressing your points.
1. Agreed. I disagree with RP on this point. I have no problem with that because it is refreshing to have a candidate actually attempting to address Constitutional issues instead of simply pandering to the great unwashed.
2. Agreed. I also offer the Marines guarding the mail and the Army going after Pancho Villa. Let's not forget the opening of Japan as well as sending the Army into the Phillipines after finishing off Cuba. And of course we cannot forget westward expansion. Short version, we have often deployed the US Military without any Congressional "Declaration of War". Personally, I like a President who is hesitant to start beating the drums. It might make a hole in the bodybag factory but I can live with it. I also liked his idea of letters of Marque and Reprisal.
3. This is the one I disagree with you personally about. Citing the federalist papers is no Constitutional argument. If it doesn't literally say so in the Constitution, then that is the end of it. The fed or anti-feds was a series of debates. The formats of the day could be likened to the blogs or message boards of today. In essense, the arguments published were taken into account and either accepted, rejected, or morphed into something. The Constitution is the distillation of those and other arguements. If you get a speeding ticket, you cannot argue that Senator Binotz aregued against it before the law was enacted. It is the final cut, the literal word if you will, that matters. Not the arguments leading to it.
4. I understand where you are going there. JFK should have been charged with treason. Kerry visited and essentially endorsed the NV cause. He should not be a Senator today. But, it was not politically expedient to prosecute thanks to the public sentiment of the times.
The bottom line is that RP may have a few ideas that are out in left field but he isn't promising the sun, moon, and stars. Most folks swallow the horseshit spouted about the "administration" this or that without realizing that Presidents sign the legislation and make on the spot calls only.
The next bottom line is that of all the liars and cheats running for office, he's the only one actually proposing to make the government smaller. Besides, I want me one of them twenty dollar gold pieces.