Maybe... If the D/ST is consistently producing short fields, then there are a lot of missed opportunities for him to gain EPA on their own side of the field (though the D/ST can be credited for huge EPAs). But, as you get closer to the endzone the same 3 yard gain gets you a higher EPA. So that could be offset. Looking at the distribution that guy created specifically for Goodson, its saying that even though he might have done things that are good for him, it didn't translate to improving the team's situation very often.
One consideration is lots of guys that do this calculation take out whatever they consider to be "garbage time" - any plays that occur when the game is functionally already over. So if he's racking up yards while Iowa is up by 21 in the 4th Quarter, he may not be getting credit for those runs. There's no standard calculation for EPA so you have to dig into how different people calculate it.