I don't know if I agree with this. Duquette's image and credibility have really been damaged by this Balfour fiasco IMO. Yeah, everyone knows Petey is Petey, but Duquette is tied to this mess. How do you make a deal and announce it before you have the owners approval. Even if Petey changed his mind it smacks of incompetence and mis-communication up the chain of command. Sorry, but Duquette takes a big hit in collateral damage. It also shows weak leadership by Duquette to be lead around the nose by Petey and then stand up their and lie that Balfour isn't healthy to cover Petey's tracks. So there is a lack of integrity there as well.
Speaking of former O's GMs, Beatty, Flanny and McPhail never got another sniff of another GM job, They were deemed failures by the league because they couldn't build a team that could crack .500. Mostly because of Petey, but nevertheless, they failed.
breaking up quotes is difficult with this new platform, so I'll try to answer you point by point.
1) DD and the O's didn't announce a deal was finalized. they announced that they had agreed to terms with GB, "pending a physical". every deal in mlb has that caveat. Napoli faced the same situation last winter with Boston.
2) if you want to blame DD for the probability that PGA changed his mind, that's your prerogative. but it only serves to give you more than one target on whom to project your frustration. I've followed this team long enough to know that the person sitting in the GM chair isn't the problem.
3) collateral damage isn't DD's fault, and you are the only person, I know of, who blames DD. that doesn't make you wrong, but your being right, makes several mlb insiders wrong.
4) as for weak leadership, DD isn't the leader, or the decision maker. PGA is. all responsibility for this seems to be laying at the owner's feet.
5) questioning DD's integrity and moral character for publicly delivering the company's message, is like blaming Tony Snow or Jay Carney for delivering messages from the white house. you're literally shooting the messenger
6) Beatty was a failure before he came to the O's. that's why he didn't get another job after his contract ended. Flanny never tried to get another GM job, because he was only interested in working for the O's. and McPhail hasn't tried to get another job yet. in a recent interview he mentioned that he is only now starting to get the itch to get back in the game. also, you may be interested to know that it has been repeatedly speculated that AM will be tapped to replace Selig. so he must have some degree of credibility left.
"There are three kinds of lies: lies, damn lies, and statistics." - Benjamin Disraeli