I don't think the entire offense needs to be scrapped.
It doesn't, nor will it, IMO.
Dallas wants to lean on having the identity of a physical running game.
Cool.
Getting Travis Frederick back next season will be much needed here, I can't overstate how much his absence hurt the OL this season. Having a run first team means you will hand the ball off more often on first down than other teams do or analytics say is wise. It also means staying with the call sometimes even when the opposing defense stacks the box expecting #21 to get the hand off.
But it also means becoming more flexible in those situations.
If an opposing defense is continuously stacking the box and daring the Cowboys to beat them with the passing game, or if their front seven is simply a bad match-up for our OL, we need to be able to go through the air with success.
That's on the coaches and players.
To me the epitome of the Linehan offense was the 4th & 1 vs. the Rams where the Rams defense shifted so there a huge mass of bodies exactly where Elliott was suppose to go... And of course Elliott went to that spot of the LOS and the play failed miserably.
That kind of thing simply can't happen.
Versus what the Rams did on third down on the final possession of the game.
Put the QB on the move with a rollout on third down with the option to pass or run.