The problem is Durant sucks, McClain is a reclamation project, Spencer has had one year in his entire career where he's been an impact player, Melton is coming off a nasty knee injury and is a downgrade from the starter from last year and Sean Lee is out on a yearly basis.
This isn't a tremendous core of talent you're talking about here when you look at it.
It's the best we've got, and likely good enough to make us an average D if they can stay relatively healthy on that side of the ball. Which, once again, it looks like they won't be able to.
McClain's not just a "reclamation project" like Amobi Okoye or something. He's a reclamation project who played lights out in his first 2 games.
As for the other guys, you can make pretty much anyone "suck" if you just put a negative spin on them and ignore their positives.
"Romo has 1 playoff win, Witten's slow, Murray fumbles, Dez is a ticking time bomb..."