I have a number of fears about switching back to the 4-3.
1. It creates some major needs on defense. The last time we switched schemes we used the #3 pick on Tyson Jackson... Would have to see a defense "need" prevent us from taking a QB.
2. When you look at all the DC names we heard of most of them run the cover 2. I think that's an outdated defense, especially against running qbs. While I'd love to have Lovie Smith, I don't want to see the cover two back in KC.