Defensive issues are personnel, not coaching. You land a player like Haloti Ngata that eats up blockers AND still gets push, the linebackers are able to do their job more efficiently. The secondary can afford to take some risks.
Offensive issues are purely coaching. Yes, the offensive line is bottom half in the NFL to put it nicely, but they can move the ball with the best of them. I say the issues are coaching because between the 20's they stroke it great, but once inside the red zone the play caller confuses creativity with cuteness.
Special Teams issues are personnel due to injuries. You simply can't keep restocking your special team unit with players off the street and expect All Pro results.
I really hope having the Packers ass handed to them two years in a row by the 49ers sends the coaching staff a wake up call that status quo is a no go. Don't overhaul the whole system, no, but quit being so damn stubborn and consider for a moment you're not the best everything to anything.
In other words ... Packers need a slight dose of humility and I'm hoping the the 49er's losses provided some.