Multiple areas to improve.
To me, if Dallas were to truly go all in, it would mean
1) improving the No. 2 WR spot in free agency (moving Cooks to three and getting rid of Gallup)
2) improving the No. 1 RB spot in free agency AND drafting a backup/future starter (get someone who can plow the middle since that's what McCarthy has shown that he values more than anything else from a back)
3) improving center by going after a top FA there
4) improving DT/3-tech with a top FA (and upgrade NT, although I'd be OK with Hankins returning)
5) improving DE with another top-notch pass rusher
At QB, I don't think it's realistic to think we're going to make any moves.
At TE, I'm happy with the young guys we've got.
At OL, I'd probably re-sign Tyron if the amount is reasonable and keep working on seeing if Richards and Bass could be developed into future starters, other than signing a top FA center.
At CB, I'd re-sign either Gilmore or Lewis to be the third corner to Diggs and Bland.
At LB, I'd make it a draft priority, especially if whoever is the DC moves Parsons more to DE. (I feel OK about Overshown and Clark at the position competing with an early-round rookie.)
At S, I'm OK with Hooker, Wilson and Bell.
So my "all-in" plan would be five big free agent moves, which the Joneses would never do. They can do it, though, with new contracts for Prescott, Martin, Lamb, etc., that would bring down their hits and open up space. Yes, it would also mean they have to eat some dead cap down the line, but other teams have shown that you can do that and get right back on the horse. Go big or stay home, which is all we've managed to do under this current FA philosophy.