I've said it before, and I'll say it again; McCain is just an awful public speaker.
At least he has a revolutionary new plan to balance the budget. What is this wonderous plan, you ask? Just win the wars in Iraq and Afghanistan, silly. And then use those savings to eliminate the deficit. Still no word on how he plans to pay for all the tax cuts he's promised, but I'm confident we'll hear some bold new initiatives from the McCain camp in the coming months, like "John McCain will lower the price of oil", or "John McCain will ensure that we find a cure for cancer" (which would lower health care costs, of course), or "John McCain will make first contact with space aliens who will give us all kinds of cool world-saving technology".
UPDATE: Steve Benen sums up McCain's economic plan pretty well:
There’s a $410 billion budget deficit, which McCain will eliminate in his
first term. How? He just will. He wants to cut taxes by about a trillion
dollars. How can we afford it? We just can. McCain realizes the value of the
dollar is down, and he’s committed to reversing this. How? He just will.