It's really not. It's pretty easy to connect the dots unless you just simply do not want to see it and would rather dig your heels in instead. They clearly wanted to get their most athletic guys into position in the defensive front in order to try and stop what Kansas City was going to try to do. That's the only logical reason why Jordan Richards would be seeing more snaps at backer than David Harris. They were worried about team speed. The experiment, as you note, fell flat on its face. Not only were they still not athletic enough to stop what KC was doing on the edges, but they were also getting ran over like grass on runs up the gut.
@Tony2046 have you reviewed this on the all-22 yet? I've only seen the highlights and, on those alone, I noticed three plays where KC was able to exploit the lack of speed and athleticism in the defensive front.
- 2:53 - Hunt in the flats takes advantage of Richards in space for the score.
- 6:12 - Pitch to the right, Marsh and Van Noy in the area and Van Noy can't get there in time.
- 6:42 - Van Noy not touched, not able to get to the sideline in pursuit quickly enough, big gain.
And that's just from the highlights. Review of the All-22, and the game itself (which I actually intend to go back and watch this weekend before the storm hits) should show more examples like that on runs off the edge and on read option plays (which were also designed to get the front in pursuit sideline to sideline). You can feel free to make an argument similar to Deus' and point out that it's simply a talent issue. I'll be happy to hear that. The two would coincide at that point since the talent would be lacking in speed as well. It would also point to why they were working out Ayers. But the fact of the matter is that speed is an issue for the defensive unit fielded in Week 1. The Patriots will address this and tie up their loose ends as they see fit.