Well, personally asides from the list being good, its not particularly nice to "lol" at them. Duff has been excellent at Fulham, but struggled with fitness, N'zogbia was brilliant at Wigan and, theres more than one very decent footballer at Villa playing awful football, I'd be blaming Mcleish there not N'zogbia, he's still shown touches of pure class this year and if Villa get a real manager he'll be excellent again. Bassong was overhyped but given a run of actual games he'll regain form, decent CB.
Nolan is usually half decent but again in a team that plays negative football he won't be at his best and Given is still an outstanding keeper, played a good number of games at City where he was great and is still great.
The most important thing amongst those deals is, offloading players who weren't good enough, and getting at the very least good value for the players they did sell.
AFAIK Newcastle brought in around 25mil total in the previous two seasons through effective selling and while spending a decent amount on players also, just far better value players.
Nolan isn't and wasn't a bad player, just not great value on the wage he was on, same goes for a lot of the guys on that list.
Barton, he may be sucking this season but again the really important thing is he was on a ridiculous wage and wanted to keep a ridiculous wage. Most people(you included? I can't remember) thought getting rid of him was a very bad thing at the beginning of the season, most people were saying he was brilliant for you last season, and he did work pretty well for you last season. Ultimately it was simply a good business deal, the fact that he went to QPR for the money and got stuck in a pretty awful team has no relation to the fact that at the time of the sale, he was one of your most inform players and he was sold not for being bad, but it made better business sense to replace him with someone cheaper.