Here's the thing about that drop.... Was it one of Brady's best throws? Nope, he could have done much better, considering how free Welker was.
Would it have been a great catch by Welker? Yep, considering his height, and how he had to turn his body. It would have been a great catch.
Here's the thing where it gets tricky. Welker was going in to a contract year. He wanted more money. Wasn't he looking for around $10 Mil a year? If you want to be paid like that, you HAVE to make that catch, at the spot, at that time of the game. No question. He didn't. He and the team went thru a contract dispute that off season. The team used the franchise tag on him, and paid him that season $9 mil, and he dropped a sure fire first down against Baltimore in the AFC championship game. That combined with Talib getting hurt, and no Gronk we never recovered.
Thats where it soured between Welker. He wanted a kings ransom, which looking at his stats alone, he deserved, but he went 2 straight years dropping key catches in the biggest games of the year. I never really faulted him as much for the SB drop, but after the Baltimore AFC championship game, esp knowing him and his agent were going to ask for big bucks, I was ready to move on from him. Then he pretty much went to Denver, as opposed to staying in New England, where he was a legend, for a deal that gave him what a mil more? He burned his bridges here.