Ryan already adds a lot of 4-3 looks to his scheme or did before injury decimation..the 4-3 has many advantages over a poorly manned 3-4 like ours ,we lack the right LBs and safeties in particular for an effective 3-4..but i like ryans defense it just needs the right secondary and LB personnel ,which getting the right players for an effective 3-4 is not an easy task especially with so many teams going 3-4 these days.....just another reason to discuss changing to the 4-3 my own opinion is to go with whatever our personnel is best suited for which would currently be a 4-3...