I couldn't disagree more with your thoughts on the DL.
First off, Dareus won't be traded. And Kyle can't be lost because of his leadership and experience. But I'll play along and say that they do get rid of both those guys...you want to replace them with "space eaters"? For what, so we could be even more inefficient at rushing the passer? I just don't see Rex wanting a Vince Wilfork type player.