Here's how I see the trades.
1) Payton is better all-around than Eric Byrnes. Payton will not make the diving catch in the bullpen, but he also won't dive for a ball he has no chance of getting and turning a 1-run single into a 3-run double. He's also more consistent against right-handed pitching, which is a hole in Eric Byrnes' game (and Bobby Kielty's as of late.) Byrnes hits better against lefties, but what good does that do? The A's have only faced like 5-10 lefties all year. Also, Byrnes had his conflicts with Macha and Beane and was getting paid $2+ million to ride the bench so it was time for him to go.
2) Jay Witasick is a better pitcher than Chad Bradford. Bradford is coming off a major injury and major surgery and is not doing that good in AAA. Witasick has an ERA of about 2.50. He gets more than a strikeout an inning. He only gives up about 1 walk for every 4 strikeouts. Oh yeah, HE'S PITCHING IN COLORADO. My feeling is that Chad Bradford is damaged goods and will spend time on the DL every year from now on... That delivery and a history of back problems is not a good combination.
3) Omar Quintanilla was on the decline in AAA. He was next in line for 2B behind the logjam that's already there in Ginter/Scuatro/Ellis. Good news is, we have Chad Pennington now, the #1 draft pick from this year's draft. He's better than Quintanilla and has more upside. He'll move over to 2B now that Crosby is locked up for a long time. As far as Joe Kennedy goes, last year he had the best ERA a Rockies starter has ever had in that park. Plus he's a lefty. I have a feeling there's something that Beane knows about him that we don't. Anyway, he's going to be in the bullpen and will probably be a lefty specialist like Ricardo Rincon. If he doesn't work out, no big loss, they've upgraded elsewhere at the cost of a minor league player that probably never would have made it to the show.
Overall, it looks like a good move... And I'm 99.9% sure that Beane is not done yet.
Get ready for that hot 2nd half the A's always have.........