This is alarming, but the solution is not to run on 3rd and 4.....it's what personnel is on the field that matters most to a defense.
I can tell you for certain, screens/draws are kinda like running plays and Bevell has three major problems.
A) Fred Jackson is isolated or has been brought in as a "3rd down back"......he's not been a threat to run on 3rd and 4 or less inside, because the line isn't good enough, Jackson has lost a step or has lost a step because he's been injured with the high ankle sprain.....If you replace Jackson with Marshawn like Bevell has done most of his career OR with Turbin and Lynch, you diversify the offense.....you used to screen with Turbin or Lynch, you can inside handoff to either and send the other in motion to take a defender with that back.....Jackson doesn't demand that attention.
B) If you add Lynch, at least you have better blitz pick up, if teams decide to blitz Russell Wilson on 3rd and 4....most times with Jackson, you can blitz and know Jackson is not a threat as a screen catcher, to burn a blitzing defense.....there is no "speed back" that can catch a pass AND be reliable enough in pass protection.....Rawls is not in position to be a blitz pick up guy, even if you wanted to show Rawls and not Jackson.....if I saw Rawls as a defense, I would think draw and would not blitz OR I'd blitz and make Rawls show he can pick up a Clay Matthews or Luke Keuchely....not a good matchup.
C) Marshawn and Rawls (not Jackson) need to be on the field together on 3rd and short....one needs to be a threat out of the backfield to take a defender out of the box (Lynch preferably), while the threat of Rawls on a draw, screen happens.
This is not a solution to run on 3rd and 4 or less, despite what the stats say......you can work around this IF, you diversify the players in this scenario.
Just supports what we are seeing here, but Jackson has to be on the field for most of these scenarios.