I don't think many people overrated Winckowski. He's a backend starter at best, but probably a bullpen arm. If he went from being a 5 pitch pitcher to a 3 pitch pitcher in short outings, he'd probably be more successful.
Seabold was a really good prospect, but his best pitch died on the vine after his injury. The pitch just never came back. He's a AAAA guy unless that changeup comes back. I said for a while that his numbers looked good in AAA, but he had no business pitching for BOS.