Just to touch on the Ridley/Blount thing....
I wasn't going to do every game from last year, but I did look at the first 4 and last 4, and I did some counting based upon the play-by-play at Profootballreference.com. In those 8 games, Ridley had 90 attempts and Blount had 93. According to my count, which could be off by a couple, Ridley had 50 carries of 3 yards or fewer in his 90 attempts, while Blount had 48 carries of 3 years or fewer in his 93 attempts.
I did the tally quickly, and I counted short runs as short runs even if they were TDs. I also counted runs that were part of personal foul penalties, but didn't count runs on plays that were called back due to other penalties.
The bottom line was that, for the bookend 8 games, Blount and Ridley were pretty close when it came to short gains v. longer gains, percentage-wise.