You're bantering with a guy that said none of the guys on the Cowboys DLine (except DLaw) should be in the NFL. He also repeatedly mocked Marinelli and his coaching methods.
Since then the Cowboys went 12-4 in the regular season and have won a playoff game. That included winning some games, including the playoff game where the offense was stalled and the defense really had to setup up to keep them in the game. Marinelli has been widely praised by experts for coaching this defense to overachieve.
It appears that your optimism was significantly more accurate than anything that he has said.
You're right.
Many of us had a negative slant towards this defense prior to the start of training camp... But his take was mega negative.
But I could still see the chance for some improvement on the defensive line simply by cutting down the number of snaps (over 2,500 in '13) that went to bad to flat out horrible defensive lineman.
This season less than 600 snaps went to bad defensive lineman.
That in itself improved the defense considerably.
There's still work to be done, which most of us agree upon, but they're headed in the right direction. Give this defense a DE who can contribute 10 sacks and a little more consistent play at safety and you've got a top-10 defense in the making.