Tiki Barber finished with 2390 yards from scrimmage, the second most of all-time. He had more yards per carry than Shaun Alexander, he had a worse offensive line and played a tougher schedule. If Alexander wins the MVP over Barber because of some walk-in TDs, that would be a shame.
Larry Johnson might actually have been better, but he didn't get used enough early on, and the Chiefs didn't make the playoffs.
I'd be fine with Tom Brady, Peyton Manning or Carson Palmer winning the award - just don't want to see Alexander, who doesn't catch passes, and isn't known as a good blocker, to win over Barber who had a better year under tougher circumstances.