We really don't give Wade Phillips enough credit - meaning when he came to Dallas, he made this a family and not a dictatorship of power.
He also refuses to put restraints on players other than the simple rules, practice and play hard. He also had no ego with Garrett. He doesn't try to force Garrett or his D coordinator (his name escapes me) to run something specific.
His ego (or the lack thereof) has been the main reason this team has flourished. He allows people to do what they do best, and this includes Romo. Now Romo is doing his thing with no worries of being bi***ed out, or treated like a child. He knows if he messes up, they will explain to him his adjustments, and he can then go back in and get it done.
TO has benifited from Wade as well, and now TO can be close to Romo and not have to worry about all the media stuff and the ego driven attitudes, he can just play.