I know this may seem sacrilege, and even as a life-long Packer fan I too would be hesitant to see them revamp such a classic stadium in such a drastic way.. but the reality is the Green Bay Packers of today, and for the foreseeable future, are a fast-paced team, not a power football team, and domes tend to cater better to those kinds of teams.
Now I know that when a team comes to Lambeau on a cold, blustery day the playing field is "level" in the sense that both teams have to play in the same conditions.. but if we are facing against a power running team and it is cold and windy, I think they have the upper hand.
The other part that bothers me is players in this day and age are PICKY and have more say in who they want to play with than ever before, and you always see free agents head for warmer climates if the option is there, regardless of the team.. (and as long as the money is decent).
So I dunno, I'm thinking it's time to move forward.. cover up the stadium and provide an entire season of ideal conditions for our team, while catering more to future free agents.