There's no question that, of their myriad problems, the Giants' offensive line was the biggest and most devastating. Everything else can be traced to the meltdown on the line.
You can argue that part of Eli Manning's job is to overcome adversity and raise the level of play of those around him. But even the best quarterbacks need at least some time to do that stuff, and Manning's pass protection was cripplingly bad last year.
You can make the argument that this year's starting group looks more talented than the one with which the Giants started the 2013 season -- especially if this year's version of G Chris Snee is healthy, which last year's was not. But what remains to be seen is how they'll play together and how they'll all hold up. More than any other item on the Giants' list of offseason questions, the answer to this one will determine how much the team can improve over last season.