Might as well ask how Roy Williams will improve the OL, ST, penalties, etc.
Roy Williams is not a panacea for what ails the Dallas Cowboys, or even the Cowboys offense, he is simply another bullet in a very big gun. It is up to Wade and his coaches to point that gun in the right direction and squeeze. Recently, its been alot of jerking and scattershot results.
But the D problems are just as much coaching philosophy, game adjustment AND attitude (from the players to the coaches) as it is player performance. It is strange, but the D plays like Pacman, the person. The D, as a whole, has a overstated sense of itself, or perhaps it is exactly like Wade, too nice, too many excuses, too stubborn, too soft.
Hey good riddance to idiot like Pacman, BUT ... while he is a pea brained thug who may be overrated, especially at PR, he brought true attitude AND was the best CB on the team the last few weeks, in coverage & against the run.
The rainman will be missed, especially b/c Ball (who will play, especially against 4 WR sets) has nowhere near the confidence, nevermind the talent.
I see the X-factor as which LB is going to replace Burnett in the nickel packages. I just hope to GOD that it is not Carp. Even Lady James would be preferrable, just by a hair. It is time for Wade to let Zach loose. It is time to let the best players play, instead of "saving" them. Wade needs to just start playing w/an edge, press the WRs on 3rd and short, bring the house on blitzes a little more, PUT YOUR PLAYERS (ton of 1st rounders & pro bowlers) IN A POSITION TO SUCCEED THEN LET THEM PLAY.
AND speaking of attitude adjustments, babying Read is not enough. Just CUT Justin Rogers already. The guy is worthless. Someone needs to be sacrificed on ST, Carp was a first rounder , Tony Curtis is the backup FB and 3rd TE, but Rogers is a POS, as a STer AND a LB. Use the spot for ANOTHER pass rushing OLB to rest Ware and Ole Man River. Spencer is HURT .... AGAIN. For Pete's sake, sign Andy Studebaker (speed, size, coverge AND prolific pass rusher_how much better is he vs. Rogers ALREADY???), promote Tearrius George, sign an injured former 2nd rounder Dan Bazuin, HECK sign brain addled recently retired Dan Morgan (not a pass rusher, but 300% tougher than Carp/Rogers/Curtis COMBINED)!!!!