If this switch does not turn out, I am afraid we will still stay in the 4-3 for at least two more years. There is no way Jerry and Co can sell us fans another scheme this soon and admit it was a mistake. I am not certain this is the wrong defense, could be but also it could be the correct one. It all starts with a good defensive line and it doesn't matter which type of defense is ran if they have to continually deal with injuries. Dallas could play with 12 men and still be bad if the front can't do its job. The defensive front is the root of all the problems IMO. Changing coaches and schemes will not make a bit of difference.