I probably went overboard with saying Ryan's job is at risk IF he pushed to replace Ratliff as the starting NT but I think many overestimate the honesty a DC would have with the GM who also happens to pay his paychecks and determines his future based on ALLOWING him to make other pivotal decisions outside of the NT/Ratliff decision.
Previous comments like, "Brockers could have been the NT if we drafted him...or we need a premium difference making big NT to rationalize replacing a Ratliff as starting NT. Ryan doesn't have the freedom to roll out a starting NT without considerable pedigree due to the FO's affection with Ratliff and the financial investment involved.
Like many have said, Ratliff wouldn't be AS disruptive in terms of his personal production, but he could be more influential in terms of improving the pass rush by assisting at end with a real NT to push to pocket back, leading to more sacks from outside rushers. You guys act like there is only one option (singing along with the FO) while others would like to see some improvement or EFFORT in improving this obvious lacking area.
Ratliff has worn down throughout the last two seasons and that is well known by most fans who simply watch the games. The better question to our FO/coaching staff is why are we ALLOWING him this opportunity to get worn down early, making him nearly worthless as a 4th quarter pass rusher later in the year? As some have hinted and I agree with, this structure just doesn't seem beneficial to the performance of the defense as a WHOLE. Ratliff simply doesn't offer enough disruption as a pass rusher to warrant to not signing a sufficient pocket collapser to help our outside rushers and corners.