The one thing you don't see on this thread is the list of names of the players DanO acquired who've done real well since arriving in the organization. Simple reason for that. The list doesn't exist. Would that be acceptable next year and the year after? Absolutely not. That's why I grade him low, because it's a show-me job. I don't give speculative brownie points on the hope that maybe his moves, or lack thereof, won't look so bad in the future.
Fair enough on the show-me criteria (I personally like to give players a little more time to perform if they're minor-leaguers), but I think Josh Hancock, Anderson Machado, and Javon Moran have all shown a little bit. Todd Jones was pretty solid, then brought a fair return when cashed.
Lidle flopped, but the Reds got three guys for him (of which two showed some potential post-trade). Vander Wal was an unmitigated flop, albeit not something that really seemed like DanO's fault.
DanO did get downgraded from me for not doing more to bring in some halfway decent pitchers in the offseason; that's the biggest knock against him.
Bong and Nelson had poor seasons, but could conceivably bounce back, so I don't grade that deal worse than "mediocre" just yet.
My grade could fall precipitously based on what happens over the next few months. But I would also think that if DanO can get rid of Danny Graves, pretty much everyone here would bump him up a letter grade or two without a doubt.