As nice as that sounds, I don't think the Packers will be able to afford a Free Agent CB that would be considered good enough to be a starter. I think they are going to have a hard enough time retaining enough of their own players and figure out a way to still meet the cap limit, that shopping for high end free agents like a starting CB won't be plausible, at least in the initial stages of Free Agency.
Now what could and I think most likely happens this year in Free Agency is a Ted Thompson Wet Dream. Due to a lower than predicted cap, the initial free agency period is going to be a buyers market, with few buyers having the pick of the liter on top free agents, but still probably having to pay "going rates." After the dust settles, there should still be a huge supply of players that went unsigned. This is when the TT's of the NFL salivate and swoop in for some bargain deals.
So sure, they might find some bargain 1 year deals on CB's, DL, WR's etc. but they still are going to have to scrimp and save to do it and definitely will have to cut some of their own fat in the process.