Okay, there are a few things to comment on here, so i'll number them.
3) To Petrowsky: Please state again which two prospects you'd rather have than Shelby Miller? If it's Smyly/Crosby, you need some reasoning to back that up, because even with Miller's stock being down a bit, you might be the only person on the planet who would have that preference.
I don't need to restate it because it's in the text in this very thread. You do not have a crystal ball nor does anybody on this planet. No one knows what Shelby Miller will become. Yes, he was ranked extremely high as a prospect last year. That doesn't mean he will become a stud starter. With the position the Cubs are in they need to stockpile pitching prospects to gaurantee that a few will pan out and reach their potential. I would rather receive two prospects with upside than one guy who may or may not be a stud. The last pitcher in the Cardinals system to win pitcher of the year two years running was Rick Ankiel. Anything can happen. With the state of the Cubs' system they need to get as many guys with potential, and not just trade away assests for one guy who has stud stuff. If the Cubs had a couple of prospects who were close to contributing at the major league level then you absolutely make the deal for a guy like Miller. If he doesn't pan out then you still have some other guys to fall back on. The Cubs do not have this luxury. You can have your own opinion. Your ideas could be more succesful than mine or vice versa. Neither of us are FO personnel for a reason.
But your view is quantity vs. quality, or at least that's what it seems. Is that your view?
PS - I totally missed the fact that you're the one who started this thread. My apologies for not connecting those dots.