Is Jones a dominant DE? No he isn't. But he is a guy who is a near-lock to get 10 sacks a season if he stays healthy. He's gotten 36 sacks in 55 games here (0.65 a game, which equals to 10.5 sacks over 16 games). Mark Anderson had 36.5 sacks in 98 games (0.37 a game or 6 over 16 games) and Banta-Cain 27.5 in 113 career games (0.24 a game, 4 sacks over a full season). Banta-Cain and Anderson's production came out of nowhere and I think the coaching staff knew perfectly well that they couldn't count on them replicating this production. And that's they point here, with Jones you know what you have, with pick-ups like Anderson or Banta-Cain it's like rolling the lottery.We recently saw both Tully Banta-Cain and Mark Anderson reach 10+ sacks in seasons here, yet still moved on from them. The fact that old ass Andre Carter did it as well probably goes against your point. The fact is that other DEs have been able to rush the passer with success on much cheaper pacts.
I'm not fundamentally opposed to a Jones trade, it depends on what we get out of it. However, I think people are a bit too loose in thinking that we could plug any DE in there and it won't really affect the defense just because Jones is not a dominant player. It's not only about what Jones will bring, it's also about the ripple effect of pushing players who can't play big number of snaps into roles that are too big for them. I think the DE position is in a very good balance right now and am hesistant to break this balance without seeing a suggestion of how to maintain a similar balance first. As I said earlier, in case of a Jones trade we'd need to get another DE with starter potential.