The Packers have many personal decisions to make. Clay Matthews did not get serious mention as a possible player to be replaced. As for Nick Perry, I've never rated him better than a B- player. Fackrell, IMO, is better than both Matthews and Perry. Perhaps this need will get addressed in the Free Agent market and/or draft.
The TE is a critical position in LaFleur's offense. Graham, while a veteran receiver, has never shown mush as far as blocking skills. Keeping him for another season, could either be very bad or very good. In any case, GB must acquire TEs that can first block well. but catching balls should not be totally unfamiliar. Once again, this need may also get addressed FA market and/or draft.
As for Brian Bulaga, as loved as he is, he is a key position player at ROT and his heir needs to be found and trained. Jason Spriggs, IMO, is an average OT and not the heir apparent. I understand that some very good OTs will be entering the 2019 NFL Draft, perhaps GB will get one with their 2nd first round pick.
Kevin King may get healthy and shine at Safety in the OTAs and TC. DC Pettine, will IMO, field a better defense. An Edge Rusher is his #1 priority need.
Keep Cosby, but bring in some competition. Motivation can be an awesome thing.