3-4's require a war daddy Vita Vea type in the middle, two versatile inside and edge setters on both sides, two inside LB's that can fill gaps and two outside twitchy edge/LB's that can cover in space AND rush the passer.
So take your pick on who we need to fill all those roles, only 2-3 of which are filled already with the guys on the roster and new signings.
But to answer your question, youth, that's what we need. No more bargain basement over the hill vets who break down by week 11 or 12 with diminished return.
Some of those guys can be rotation guys, but not depended on to start. We gotta get young in the front seven.
Again, why I think 75% of our draft picks this year are going to be front seven.