...extremely? Why? The Packers in the second half of the season last year were one of the better teams in football. They were the youngest team in the NFL by a metric shitton, and still are the youngest team in the NFL. There's reason to believe it wasn't just a fluke, and that improvement is much more likely than regression.
They addressed the biggest weakness of the team (safety play) and return practically the entire offense (apart from an arguable upgrade at RB). But the thing I'm most excited about is the new defensive scheme. I don't especially care about 3-4 versus 4-3, but the Packers were playing a type of glorified prevent defense at all times last season. It was gross. Most anything would be a improvement. New, young coordinator is saying all the right things. We'll see how the scheme actually shakes out.
Now when it comes to Love, I think Love is definitely going to be an above average QB (which might be enough to win the division on it's own), and possibly an MVP candidate, Based of off last year, I think it's weird to claim it would be a surprise to see the Packers win the division. The Lions should be and are favored...but I think it's closer to a coinflip between the two, with the Bears being a 1-in-5 darkhorse.