I don't think it's crazy at all. Having said this, I consider myself a huge Brad fan, and can certainly see the case for him to start over Gibbs.
But like I said in my original reply, I like the idea of Levance creating and Lamar penetrating from the wing to set up shots for Ashton. And whether or not you think he's overrated, Ashton was a very good three point shooter.
I'd like another shooter on my starting floor, and that just wasn't Brad. Brad's was great at creating off of the wing ball screen, but on my team, I've already got Levance to work off the high ball screen and Lamar to work off the wing ball screen, and I'd like both to be able to find Ashton.
When Lamar was a senior, he turned Josh Newkirk into a pretty productive shooter as a two guard, so I think he'd do even more for someone like Ashton.
I also wouldn't say Brad was a great defender (he was decent), and Ashton was OK as a defender until something went a little south in that regard his senior year. But he didn't play "zero" defense as you suggest.
Comparing the 2003 and 2004 teams against 2009 or 2011 are pretty interesting exercises. I'd probably rank 2009 and 2003 as very close (1 and 1A), with 2004 a step behind. That 2004 team could defend like none other. But down the stretch, they simply could not shoot the ball nearly well enough to be a real final four contender. 2009 was more explosive offensively and Blair could rebound like no one else in the last 30 years but 2003 was more balanced.