I agree that Woo should have taken Kass. When I was watching the finale, I turned to my dad (a casual watcher) and asked him who he would have taken and even he said Kass. I was stunned when Woo took Tony.
However, Woo vs. Tony was a much more interesting finale which genuinely had me wondering who would win. Honestly, if Woo took Kass, the winner (Woo) could be seen a mile away in a clear unanimous (or at least blowout) victory. The fact that people didn't know who would win made it good TV at least.