I think having it outdoors anywhere is a bad idea. And outdoors in the Northeast in Feb makes me question the mental capacity of the NFL leadership.
The SB is the one game that the NFL should want the best team to win. And more important to their wish to market the game outside the US, the best quality game possible.
Having both teams running around slipping and sliding in a whiteout like that awful Bills/Browns Monday night game a few years ago would be a disgrace, And that is exactly what they are risking, not just to a US audience, but to a worldwide one.
I for one hope for the worst weather conditions possible so they never consider making that mistake again.
However I must admit that the possibility of the halftime pop star de jour slip and fall on his/her ass during the live performance (and having the music continue on as if nothing happened) might be worth it.