Manning, who will be playing in his second pro bowl (assuming the Giants do not make it to the Super Bowl), is getting the recognition he deserves for his fantastic play this season. Lions and Cowboys fans can argue that Matt Stafford and Tony Romo are more deserving, and they certainly have a case. Both quarterbacks are having better seasons, statistically speaking, but Manning has carried his team with his clutch play, especially in the fourth quarter, a trait that has not gone unnoticed by his peers and fans alike.
Pierre-Paul and Cruz were not on the fan ballots, in JPP's case due to the team's strength at DE (Tuck, Osi), and in Cruz' case, due to his relative anonymity prior to his eye-popping first full season in the NFL. Both players' chances on making it to Hawaii's exhibition game relied on the players and coaches, who account for 2/3 of the voting.
In JPP's case, it was enough to land him on the roster, but Cruz narrowly missed out, as bigger names prevailed: Calvin Johnson, Greg Jennings, Steve Smith and Larry Fitzgerald were the four receivers selected. Only Johnson has more receiving yards than Cruz' 1,358 in the entire NFC. That qualifies him as a Pro Bowl snub.
Pierre-Paul's 15.5 sacks are 4th in the NFL, but that number alone does not tell the whole story. The second year defensive end, who was thought to be a project, has already burst onto the scene as one of the league's elite pass rushers, and has quickly become the type of player that makes opposing offensive coordinators cringe.
Snee, like the rest of the Giants' offensive line, has been up and down due to injuries and a lack of chemistry across the line. Still, he was voted an alternate, partially due to his name value. That's the way it goes with offensive lineman.
It's possible that Cruz and Snee will join Manning and Pierre-Paul on the field in Hawaii if the players for which they are alternates skip the game, which often happens for any number of reasons. But Giants fans would be much happier to have all four Giants attending team practice that week.