Ok before you all jump down my throat, I KNOW he's had a very small sample size this year. He has played before with the Royals however.
That being said, the guy is 25, right around the time where he should be coming into his own, when the team can make a decision on him. Blanco isn't expected to be Hanley Ramirez, but it's possible he could be better than Theriot or Fontenot.
His stats in the MLB with the Cubs and Royals aren't terribly impressive, but he can hit MLB pitching and has a small amount of pop. He hit above the mendoza line the three times he appeared for the Royals, ever year from ages 20-22. In the minors, he hasn't hit very well until this year, hovering around .250. He was hitting an impressive .316 and last year he hit in the .280's. He doesn't have a ton of speed though, but there's some. He's not Daryle Ward on the basepaths, netting stolen bases in the teens every year, which is about what Theriot does. He only has one steal in the majors out of five attempts. In the minors, his SB percentage is around 75%.
With the Royals, he did have more than a cup of coffee, which is probably all he will get in Chicago unless we let go of Freel (which is the best move) or send Scales back down (eh, verdict is still out on him in my eyes). I think Miles is here to stay because of the moeny we owe him and he's a switch hitter. That being said, Andres has a better glove than Miles from what I've seen. He can field SS and 2B, which is what Miles does. I've heard people say he can play third, but I don't think he can. He's only played one game there, in the minors, but it was this year. And if you're playing Miles it's for his defense in the late innings (which Blanco is better at) or a spot start for rest (which you might as well use Blanco for so he can develop). I don't think you'd expect him to hit 50 home runs or he'd be starting.
So why not keep him? If you can get rid of Miles somehow, he might be worth it. But it seems to me like it's not smart to carry around Miles, Scales, and Blanco. And possibly Freel. So what do you do as Hendry/Lou? I like this kid, seems to fit the scrappy mold that people like, and more importantly Lou likes. I think he's worth a shot. I like the Scales story, but if there's one guy who you can send back down it's him. However, it could hurt Blanco by not getting him in every day action and at bats. Your thoughts?