It is hard to argue with the success of the Patriots over the years (when you are consistently a top contender every year, regardless of whether or not you win it all, that speaks volumes), but defense is Belichick's bread and butter is defense, and their defense has stunk for years now. The fact that they have gone 39-9 in the last three regular seasons combined is mostly thanks to Tom Brady and the offense, and I think Belichick probably thinks that as long as he has Brady, he can just throw any WRs into that system, especially with those two TEs, and they'll be fine. And he might be right. But while it is easy to say that Brady and the system made Welker, it is worth pointing out that Brady was never a QB who put up crazy great passing numbers before he had Welker (and Moss, of course, but Brady has continued to put up huge numbers w/o Moss and with Welker). Not saying that Welker makes Brady (no, it truly is the opposite more than anything), but I think it's a matter of both making the other better. And Belichick is apparently too stuck on himself to see that.