There's public transportation RIGHT to the stadium, there would have been no issue. And if they had played it when it was scheduled (which I don't see why they couldn't have moved it back) then they would have avoided most of the worst of it, which incidentally wasn't that bad.
I can't speak for Philly but LIRR service, MetroNorth and Amtrak was shut down up here and subway was very compromised. A lot of people were also stuck on Jersey Turnpike and LI area roads for hours. Maybe it wasnt that bad in Philly but I dont think it is a sign of weakness to put people's safety before what is at the end of the day just a game.
It's the subway and I don't really think sitting in traffic is that detrimental to one's safety. I didn't hear anything about problems with the subway in NY except for a few lines. We had to drive into Newark during the very worst of the storm and I would describe it as harshly as to say it was annoying. Not treacherous or even nerve-wracking, just annoying. And Newark was hit WAY harder than Philly. Besides, the Turnpike is always crap, so you can't blame that on the snow. Also, like I said, if they had just moved the game earlier the worst anyone would have had to deal with was some flurries that could have added up to maybe an inch or two over the course of the game.