The most important position in a 3-4 defense is the nose tackle. Until Elam plays up to his supposed potential they are going to have big issues.
To me, if he can't occupy two blockers we're done.
He didn't start really struggling until he got tired, which has been his MO; and several large dl share that trait. The staff did him no favors by not spelling him more than they did. To his credit, he would've died on the field had he played half that many snaps last year.
Playing fewer snaps, I think he'll do much better.