If the conversation is about whether or not we are going to blitz 5-6 guys on many plays, I think the answer is yes we will. So we will essentially borrow the concept of overloading the blockers with more defenders than they can handle to blitz the quarterback. The bigger question is whether we will use the 4-6 as a often used formation and I don't think we will. The 4-6 in its purest form uses 1 free safety, i strong safety and 2 corners with 3 linebackers (2 of which are on or near the line of scrimmage). The strong safety also plays within 3 yards of the line of scrimmage and the corners play man on the wide receivers.
Last year we used the nickel formation over 1/3 of the time if my memory serves correctly. Most times we were able to get sufficient pressure using just 4 down limemen and we dropped the linebackers in zone coverage. The goal was to make teams like New Orleans throw quickly in front of the backers and limit YAC. When we sent blitzers instead of sending the farm we just overloaded one part of the line or one area rather than sending everyone. This was due in some part to feeling that the secondary might be suspect and our corners were not great in man coverage most of the year.
Until the secondary proves that they can cover in zone and man I can't see us blitzing 6 or 7 guys essentially putting the corners and free safety in one on one matchups against the likes of receivers in the division and on teams we will face this year. I think we will use pressure but that we will be selective and more targeted than an all out blitz which is what the 4-6 often became. Look at what Jim Johnson did as an example of what we will do rather than Buddy Ryan although Johnson, Ryan, Rivera and McDermott all coached for the Eagles at one point or another.