The Hawk situation is tough. You've got a guy who was drafted #5 overall for our old scheme and is now seeing limited playing time in the new one. He's nearing the end of his rookie contract where his guaranteed money for 2011 jumps to $10 million at the start of the new league year next season. (March '11)
He's been solid in his 4+ seasons, but hasn't really been that "lights out" guy you hoped when you drafted him. Compound this with the fact you've got his backup and potential heir apparent sitting on the bench in Bishop who has been chomping at the bit for playing time. You've also got a lot of money sunk into two other players in the same group (Barnett & Chillar) over the next two years.
Do you keep him until the end of the season and then cut him loose before his $10 million becomes guaranteed? That's kind of hard to swallow considering what you have invested in the guy. You can't keep him at $10 million though either.
Do you extend him? A contract extension is probably going to cost quite a bit of money for a player who doesn't play every down in a position group where you've already got a lot of money sunk into two other guys who play more downs on average.
Do you trade him? Do you cut your losses on your investment before the deadline in Oct and try to get something for him? He could definitely bring a player in that could probably help you at a position where depth is needed and you probably wouldn't see a huge drop off on base defense when Bishop is healthy enough to play.
What ever the Packers do, I don't envy the decision they're going to have to make with him. All the above options are by no means great. Some just seem slightly better than others.