Well, the OL and Henry were bad most of the season so we had no running game most of the time and that's not really on Mariota. Secondly, with Walker down, he had 1 real weapon and CD by himself isn't enough of a deterrence to 8 guys in the box.
While you're right we will have a new playcaller, the system is supposed to stay the same so no new learning for Mariota for once. We have upgraded the OL and Henry ran like a BEAST down the stretch. That SHOULD force defenses to try and load the box. But with a better ol to protect and Walker coming back, CD and 2 MORE good wr's...we should be able to make teams pay for loading the box.
Not only should we not be one dimensional, but we should stop any team from trying to make us so. I think many players beyond Mariota are fighting for their jobs this season.