I support this, though, as someone else mentioned, the president does have a lot of power to do things like call the troops home and tell Congress to STFU about it.
Unfortunately, or fortunately, we've shown our hand when it comes to presidential races. The GOP wasn't prepared for the non-apathetic droves of us to show up at caucuses to vote and county conventions to become delegates. The establishment was accustomed to telling GOP voters who to vote for and getting their way by doing so. Had Ron Paul people not showed up to my county convention here in Georgia, the list of delegates would have been filled by names who didn't bother to attend the convention (at least in Georgia, it is allowable to fill vacancies with names of people absent as long as preference goes to people who actually show up in person for the convention). This was the way they had always done it, with one or two people showing up to a desolate convention and nominating their friends to fill slots. We, the revolution, totally threw a wrench in that by having just 4 Ron Paul supporters show up, in person, to the county convention.
I predict that the RNC rules changes will stand, and it will become much harder to get involved and try to have any meaningful influence on presidential picks. I don't want to give up, but, yeah, it's hard to win the jackpot when other players at the table know what cards you're holding.
I think Senate and especially House races are important. But you're not going to see as much money. As it is now, we're having to pool our resources and donate to people in other states to try to get them into house seats. I have no problem with that, but my funds are limited, so when it comes to supporting people in my district when (if) they step up, we're going to see just how far we as a movement can stretch a dollar. Do I support someone in another state or do I support the guy I can vote for? At least with a presidency, there is one unifying umbrella to pool funds into. Something to think about, I guess.