The Packers' pass rush was absolutely terrible this season and as a result, offenses could just key in on stopping Clay Matthews.
A pass-rushing linebacker like Vinny Curry from Marshall or Bruce Irvin from West Virginia is a necessity. Even if he is just a situational rusher, look at the impact Aldon Smith had on the 49ers.
A pass-rushing defensive lineman is also a necessity, as the Packers could take Quinton Coples from UNC if he lasts until the end of the first round (28th overall).
Either way, a DL and OLB must both be taken before Day 2 is over.