Fields would have to take an otherworldly leap. Do I think he can do it? The line will be better, I'm confident in that. Subtracting Mustipher and Borom/Reiff is a huge addition by subtraction. With better protection, and hopefully Fields is working on the quick/intermediate game, getting timing with Moore, Mooney, Kmet, Claypool, etc. If Fields develops that, and maintains his elite deep passing game the sky is the limit.
The defense would have to over perform out of their minds given their talent level. Even with the draft they will be mediocre, at best. I don't see a playoff caliber defense even with some talent coming in the draft.